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Question 1
Incorrect
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A 5-year-old boy has a temperature of 39°C and symptoms of an upper respiratory tract infection, but there are no high-risk signs to suggest that admission to hospital is necessary and it is decided that the child should be looked after at home.
What is the most appropriate piece of advice to give to the parents regarding antipyretic interventions?Your Answer: Only minimal clothing should be used and no covering bedclothes
Correct Answer: Antipyretic drugs are only needed if the child appears distressed or unwell
Explanation:Antipyretic Interventions for Children with Fever
Antipyretic drugs, such as paracetamol and ibuprofen, are recommended for children with fever if they appear distressed or unwell. However, these drugs should not be given solely to reduce body temperature or prevent febrile convulsions. Over-wrapping or underdressing a child with fever should also be avoided.
Either paracetamol or ibuprofen can be given, but ibuprofen should be avoided if the child is dehydrated. Both drugs are equally effective and well tolerated, but they should not be given at the same time. If one drug is not effective, the other drug may be added with caution over dosing intervals.
Aspirin should not be given to children under 16 years old due to safety concerns about the risk of developing Reye syndrome. Ibuprofen and/or paracetamol are appropriate for use.
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This question is part of the following fields:
- Children And Young People
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Question 2
Correct
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A 65-year-old woman is experiencing persistent urge incontinence despite undergoing a two-month course of bladder training. Drug therapy is now being considered as a treatment option. What is the recommended first-line medication for this condition?
Your Answer: Tolterodine (immediate release)
Explanation:NICE suggests using oxybutynin (immediate release), tolterodine (immediate release), or darifenacin (once daily preparation) to manage urge incontinence pharmacologically. However, immediate release oxybutynin is not recommended for frail older women. Stress incontinence is better managed with pelvic floor exercises.
Urinary incontinence is a common condition that affects approximately 4-5% of the population, with elderly females being more susceptible. There are several risk factors that can contribute to the development of urinary incontinence, including advancing age, previous pregnancy and childbirth, high body mass index, hysterectomy, and family history. The condition can be classified into different types, such as overactive bladder, stress incontinence, mixed incontinence, overflow incontinence, and functional incontinence.
Initial investigation of urinary incontinence involves completing bladder diaries for at least three days, performing a vaginal examination to exclude pelvic organ prolapse, and conducting urine dipstick and culture tests. Urodynamic studies may also be necessary. Management of urinary incontinence depends on the predominant type of incontinence. For urge incontinence, bladder retraining and bladder stabilizing drugs such as antimuscarinics are recommended. For stress incontinence, pelvic floor muscle training and surgical procedures may be necessary. Duloxetine, a combined noradrenaline and serotonin reuptake inhibitor, may also be offered to women who decline surgical procedures.
In summary, urinary incontinence is a common condition that can be caused by various risk factors. It can be classified into different types, and management depends on the predominant type of incontinence. Initial investigation involves completing bladder diaries, performing a vaginal examination, and conducting urine tests. Treatment options include bladder retraining, bladder stabilizing drugs, pelvic floor muscle training, surgical procedures, and duloxetine.
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This question is part of the following fields:
- Kidney And Urology
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Question 3
Incorrect
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A 29-year-old man who has recently moved to the UK from Uganda presents with complaints of fatigue and purple skin lesions all over his body. During examination, multiple raised purple lesions are observed on his trunk and arms. Additionally, smaller purple lesions are noticed in his mouth. The patient has recently begun taking acyclovir for herpes zoster infection.
What is the most probable diagnosis?Your Answer: Drug reaction to acyclovir
Correct Answer: Kaposi's sarcoma
Explanation:The patient’s raised purple lesions suggest Kaposi’s sarcoma, which is often associated with HIV infection. The recent herpes zoster infection also suggests underlying immunocompromise. Other conditions such as dermatofibromas, psoriasis, and drug reactions are unlikely to present in this way, and a haemangioma is less likely than Kaposi’s sarcoma.
Kaposi’s sarcoma is a type of cancer that is caused by the human herpesvirus 8 (HHV-8). It is characterized by the appearance of purple papules or plaques on the skin or mucosa, such as in the gastrointestinal and respiratory tract. These skin lesions may eventually ulcerate, while respiratory involvement can lead to massive haemoptysis and pleural effusion. Treatment options for Kaposi’s sarcoma include radiotherapy and resection. It is commonly seen in patients with HIV.
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This question is part of the following fields:
- Dermatology
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Question 4
Correct
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A 25-year-old man visits his primary care physician with great anxiety about having scabies. His partner has disclosed that he was treated for scabies recently, and the physician observes the typical burrows in the man's finger webs. The man has no other skin ailments or allergies to drugs/foods.
What is the most suitable initial treatment option?Your Answer: Permethrin 5% cream applied to all skin, rinsed after 12 hours with re-treatment after 1 week
Explanation:The recommended first-line treatment for scabies is the application of permethrin cream to all skin, including the scalp, which should be left on for 12 hours before rinsing off. This treatment should be repeated after 7 days. Malathion is a second-line treatment that should be rinsed off after 24 hours. Steroids may be used by dermatologists in cases of resistant scabies or scabies pruritus, but only under specialist guidance. Salt water bathing is not recommended as a treatment for scabies. Mupirocin cream is used to eliminate MRSA in asymptomatic hospital inpatients.
Scabies: Causes, Symptoms, and Treatment
Scabies is a skin condition caused by the mite Sarcoptes scabiei, which is spread through prolonged skin contact. It is most commonly seen in children and young adults. The mite burrows into the skin, laying its eggs in the outermost layer. The resulting intense itching is due to a delayed hypersensitivity reaction to the mites and eggs, which occurs about a month after infection. Symptoms include widespread itching, linear burrows on the fingers and wrists, and secondary features such as excoriation and infection.
The first-line treatment for scabies is permethrin 5%, followed by malathion 0.5% if necessary. Patients should be advised to avoid close physical contact until treatment is complete and to treat all household and close contacts, even if asymptomatic. Clothing, bedding, and towels should be laundered, ironed, or tumble-dried on the first day of treatment to kill off mites. The insecticide should be applied to all areas, including the face and scalp, and left on for 8-12 hours for permethrin or 24 hours for malathion before washing off. Treatment should be repeated after 7 days.
Crusted scabies, also known as Norwegian scabies, is a severe form of the condition seen in patients with suppressed immunity, particularly those with HIV. The skin is covered in hundreds of thousands of mites, and isolation is essential. Ivermectin is the treatment of choice.
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This question is part of the following fields:
- Dermatology
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Question 5
Correct
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A 65-year-old man of Mediterranean origin with chronic kidney disease presents for his annual check-up. His most recent eGFR is 50 mL/min/1.73m2 and his urine albumin creatinine ratio is 42 mg/mmol. He reports feeling well and adhering to the aspirin and atorvastatin prescribed to him last year. He has been monitoring his blood pressure at home and provides a week's worth of readings, which indicate an average blood pressure of 143/95 mmHg.
What recommendations would you make for this patient?Your Answer: Start an ACE inhibitor
Explanation:For patients with chronic kidney disease, the urinary albumin:creatinine ratio (ACR) is an important measure of protein loss in the urine. If the ACR is 30 or more, the first line of treatment should be an ACE inhibitor, as it can reduce proteinuria and provide renal protection beyond its use as an antihypertensive. However, if the ACR is less than 30, current NICE guidelines on hypertension should be followed for treatment.
In the case of this patient, an ACE inhibitor should be considered as the first line of treatment since their ACR is greater than 30. Thiazide-like diuretics are a suitable alternative to calcium channel blockers for non-diabetic patients with hypertension and can be used as a second line option. Beta blockers are not a first line option for blood pressure control in non-diabetic patients and are only recommended as a step 4 treatment for hypertension.
If there is doubt about the validity of the patient’s home readings or if they prefer lifestyle management, monitoring without medication changes may be a viable option. However, tight blood pressure control is essential to slow the rate of deterioration of chronic kidney disease and reduce cardiovascular risk.
Chronic kidney disease (CKD) patients often require more than two drugs to manage hypertension. The first-line treatment is ACE inhibitors, which are especially effective in proteinuric renal disease like diabetic nephropathy. However, these drugs can reduce filtration pressure, leading to a slight decrease in glomerular filtration pressure (GFR) and an increase in creatinine. NICE guidelines state that a decrease in eGFR of up to 25% or a rise in creatinine of up to 30% is acceptable, but any increase should prompt careful monitoring and exclusion of other causes. If the rise is greater than this, it may indicate underlying renovascular disease.
Furosemide is a useful Antihypertensive drug for CKD patients, particularly when the GFR falls below 45 ml/min*. It also helps to lower serum potassium levels. However, high doses are usually required, and if the patient is at risk of dehydration (e.g. due to gastroenteritis), the drug should be temporarily stopped. The NKF K/DOQI guidelines suggest a lower cut-off of less than 30 ml/min.
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This question is part of the following fields:
- Kidney And Urology
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Question 6
Incorrect
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A study examining glucose levels in a group of individuals taking antipsychotics reports a mean value of 7 mmol/L. The sample size is 9, and the standard deviation of the sample is 6 mmol/L. The standard error of the mean is 2 mmol/L. What is the closest estimate for the correct range of the 95% confidence interval? Additionally, suppose the study was conducted on a population of individuals aged 65 and above.
Your Answer: 5-9 mmol/L
Correct Answer: 3-11 mmol/L
Explanation:It is important to note that confidence intervals are derived from standard errors, not standard deviation, as is commonly believed. It is crucial to avoid mixing up these two terms.
Understanding Confidence Interval and Standard Error of the Mean
The confidence interval is a widely used concept in medical statistics, but it can be confusing to understand. In simple terms, it is a range of values that is likely to contain the true effect of an intervention. The likelihood of the true effect lying within the confidence interval is determined by the confidence level, which is the specified probability of including the true value of the variable. For instance, a 95% confidence interval means that the range of values should contain the true effect of intervention 95% of the time.
To calculate the confidence interval, we use the standard error of the mean (SEM), which measures the spread expected for the mean of the observations. The SEM is calculated by dividing the standard deviation (SD) by the square root of the sample size (n). As the sample size increases, the SEM gets smaller, indicating a more accurate sample mean from the true population mean.
A 95% confidence interval is calculated by subtracting and adding 1.96 times the SEM from the mean value. However, if the sample size is small (n < 100), a 'Student's T critical value' look-up table should be used instead of 1.96. Similarly, if a different confidence level is required, such as 90%, the value used in the formula should be adjusted accordingly. In summary, the confidence interval is a range of values that is likely to contain the true effect of an intervention, and its calculation involves using the standard error of the mean. Understanding these concepts is crucial in interpreting statistical results in medical research.
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This question is part of the following fields:
- Evidence Based Practice, Research And Sharing Knowledge
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Question 7
Incorrect
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A digital rectal examination and PSA test should be offered to which of the following patients?
Your Answer: A 65-year-old man with erectile dysfunction and angina (taking GTN, bisoprolol, aspirin and simvastatin)
Correct Answer: A 62-year-old man with unexplained lower back pain
Explanation:According to NICE guidelines, men experiencing unexplained symptoms such as erectile dysfunction, haematuria, lower back pain, bone pain, and weight loss (especially in the elderly) should be offered a PR and PSA test. However, before conducting a PSA test, a urine dipstick/MSU should be done to rule out any infection. If a UTI is treated, PSA testing should be avoided for at least a month.
If the age-specific PSA is high or increasing, even in asymptomatic patients with a normal PR examination, an urgent referral should be made. In cases where the PSA is at the upper limit of normal in asymptomatic patients, a repeat PSA should be conducted after 1-3 months. If the PSA is increasing, an urgent referral should be made. These guidelines are outlined in the NICE referral guidelines for suspected cancer.
Understanding Prostate Cancer: Features and Risk Factors
Prostate cancer is a prevalent type of cancer among adult males in the UK, and it is the second leading cause of cancer-related deaths in men, next to lung cancer. Several risk factors increase the likelihood of developing prostate cancer, including increasing age, obesity, Afro-Caribbean ethnicity, and a family history of the disease. In fact, around 5-10% of cases have a strong family history.
Localised prostate cancer is often asymptomatic, which means that it doesn’t show any symptoms. This is because the cancer cells tend to develop in the periphery of the prostate, which doesn’t cause obstructive symptoms early on. However, some possible features of prostate cancer include bladder outlet obstruction, hesitancy, urinary retention, haematuria, haematospermia, pain in the back, perineal or testicular area, and an asymmetrical, hard, nodular enlargement with loss of median sulcus during a digital rectal examination.
Understanding the features and risk factors of prostate cancer is crucial in detecting and treating the disease early on. In some cases, prostate cancer may metastasize or spread to other parts of the body, such as the bones. A bone scan using technetium-99m labelled diphosphonates can detect multiple osteoblastic metastasis, which is a common finding in patients with metastatic prostate cancer.
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This question is part of the following fields:
- Kidney And Urology
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Question 8
Correct
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A 4-year-old girl, Lily, has a febrile convulsion at home. She has been suffering from Chickenpox. This is her third febrile convulsion, the last one was six months ago and was during a viral gastroenteritis. The convulsion quickly terminates within a minute and Lily recovers promptly at home. Mum asks for medication to prevent further febrile convulsions. What advice should the GP give her?
Your Answer: Tell her that no preventative treatment is required for Jonny's febrile convulsions
Explanation:It is not recommended to use preventative treatment for febrile convulsions as the risks of regular anti-epileptic medications outweigh the benefits. There is no evidence that regular use of paracetamol or ibuprofen during an illness can prevent febrile convulsions. While antipyretics may provide comfort to a febrile child, they do not reduce the risk of febrile convulsions.
If a parent witnesses their child having a febrile seizure, they should take steps to prevent the child from harming themselves. Placing the child in the recovery position during the seizure is recommended. Seizures that last longer than 5 minutes require medical treatment, and parents should call for an ambulance. If the child experiences regular febrile convulsions, parents may keep PR diazepam at home to administer if the seizure lasts longer than 5 minutes.
Febrile convulsions are seizures that occur in otherwise healthy children when they have a fever. They are most common in children between the ages of 6 months and 5 years, affecting around 3% of children. Febrile convulsions usually occur at the onset of a viral infection when the child’s temperature rises rapidly. The seizures are typically brief, lasting less than 5 minutes, and are usually tonic-clonic in nature.
There are three types of febrile convulsions: simple, complex, and febrile status epilepticus. Simple febrile convulsions last less than 15 minutes and are generalised seizures. Complex febrile convulsions last between 15 and 30 minutes and may be focal seizures. Febrile status epilepticus lasts for more than 30 minutes. Children who have had their first seizure or any features of a complex seizure should be admitted to paediatrics.
Following a seizure, parents should be advised to call an ambulance if the seizure lasts longer than 5 minutes. Regular antipyretics have not been shown to reduce the chance of a febrile seizure occurring. If recurrent febrile convulsions occur, benzodiazepine rescue medication may be considered, but this should only be started on the advice of a specialist, such as a paediatrician. Rectal diazepam or buccal midazolam may be used.
The overall risk of further febrile convulsions is 1 in 3, but this varies depending on risk factors for further seizure. These risk factors include age of onset under 18 months, fever below 39ºC, shorter duration of fever before the seizure, and a family history of febrile convulsions. Children with no risk factors have a 2.5% risk of developing epilepsy, while those with all three risk factors have a much higher risk of developing epilepsy, up to 50%.
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This question is part of the following fields:
- Children And Young People
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Question 9
Incorrect
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A 59-year-old man comes to your clinic with hypertension. His initial investigations, including blood tests, electrocardiogram, and urine dip, all come back normal. His QRisk2 score is 18%. His blood pressure readings are consistently above 150/100. He has no significant medical history, but there is a family history of high blood pressure. Despite making lifestyle changes, his blood pressure remains elevated, and you both agree on treatment.
What is your plan for managing this patient?Your Answer: Prescribe and angiotensin II receptor antagonist
Correct Answer: Prescribe a calcium channel blocker
Explanation:First Step in Managing Hypertension
Having diagnosed hypertension, the first step in management involves considering several key factors in the patient’s history. One important factor is whether the patient has diabetes, as this influences the choice of antihypertensive medication. In diabetic patients, ACE inhibitors or ARBs are preferred over calcium antagonists due to their secondary benefits in managing diabetes.
Another important factor is the patient’s age, with a threshold of 55 years indicating the preference for a calcium antagonist over an ACE inhibitor or ARB in step 1. This is because these medications are less effective in older individuals. Other age thresholds, such as 40 and 80 years, are also important in diagnosis and monitoring.
While not relevant to this question, it is important to note that in patients under 80 years of age, the target blood pressure should be below 140/90 in clinic or below 135/85 in home or ambulatory monitoring. Additionally, a statin may be considered for patients with a QRisk2 score above 10.
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This question is part of the following fields:
- Cardiovascular Health
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Question 10
Correct
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A 30-year-old teacher presents to the out-of-hours General Practice with complaints of conjunctivitis. She wears contact lenses. She has been using over-the-counter Brolene® drops for the last two days to try to treat the problem herself, but now finds her vision blurred in the affected eye. On examination, she has florid keratoconjunctivitis and visual acuity of 6/36 in her affected eye. Fluorescein stain is taken up centrally.
What is the most likely diagnosis?Your Answer: Corneal ulcer
Explanation:Differential Diagnosis for a Unilateral Eye Condition
One possible diagnosis for a patient with a unilateral eye condition is a corneal ulcer, which can be caused by contact lens use and may lead to serious complications if left untreated. However, other conditions should also be considered. Viral conjunctivitis, which is typically bilateral and accompanied by copious discharge, may follow a viral upper respiratory tract infection. Chlamydial conjunctivitis, on the other hand, is not usually unilateral and doesn’t involve fluorescein uptake. A dendritic ulcer, caused by herpes simplex virus, is characterized by small branching epithelial dendrites and doesn’t exhibit central fluorescein uptake. Finally, a foreign body may cause similar symptoms, but would typically be visible upon examination and not involve central fluorescein staining. A thorough differential diagnosis is necessary to accurately diagnose and treat a patient’s eye condition.
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This question is part of the following fields:
- Eyes And Vision
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Question 11
Correct
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A 50-year-old man comes to his General Practitioner complaining of recurrent loin-to-groin pain and frank haematuria. A CT scan of his KUB shows a renal calculus located at the left vesico-ureteric junction. What is the most accurate understanding of this man's condition?
Your Answer: Recurrent proteus urinary tract infections (UTIs) are associated with renal calculi
Explanation:Understanding Renal Calculi and Recurrent Proteus Urinary Tract Infections
Recurrent Proteus urinary tract infections (UTIs) are often associated with renal calculi, which can be detected through persistently alkaline urine and a finding of Proteus on culture. This is because Proteus organisms produce urease, which converts urea into ammonia and alkalinizes the urine, leading to the formation of organic and inorganic compounds that contribute to calculi formation.
The severity of symptoms related to renal calculi is directly proportional to the size of the stone. Smaller stones usually cause severe pain as they pass into the ureter, while larger stones such as staghorn calculi often remain asymptomatic in the kidney. A moving stone is usually more painful than a static stone.
Contrary to popular belief, most symptomatic urinary calculi originate in the upper renal tract, with the location and composition varying for different types of stones. While gallstones are composed of bile salts, renal stones are usually composed of calcium, oxalate, or uric acid.
About 75% of renal calculi are radio-opaque, meaning they can be detected through conventional KUB X-rays. However, urate and xanthine stones are radiolucent and may be too small to be detected through this method. Understanding the relationship between recurrent Proteus UTIs and renal calculi can help prompt early detection and treatment.
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This question is part of the following fields:
- Kidney And Urology
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Question 12
Incorrect
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A 12-month-old boy has a history of recurrent chest infections requiring antibiotics. In addition, his weight gain is poor, dropping from 50th centile at birth to 5th currently. His mother reports that his stools are always loose. His mother and father are well and he has no siblings.
What is the single most likely diagnosis?
Your Answer: Crohn’s disease
Correct Answer: Cystic fibrosis (CF)
Explanation:Understanding Cystic Fibrosis and Other Possible Causes of Recurrent Infections in Children
Cystic fibrosis (CF) is a genetic disorder that affects the secretion and absorption of sodium and chloride, leading to problems in the respiratory, gastrointestinal, pancreatic, and reproductive systems. While CF is the most common lethal genetic disorder affecting Caucasian children, it can present at any age and is now often detected through newborn screening. Frequent antibiotic use can lead to the development of resistant bacterial strains, but it is unlikely to be the sole cause of recurrent symptoms in a child. Other possible causes include Crohn’s disease, immunodeficiency, and, rarely, sarcoidosis. It is important to maintain a high index of suspicion and seek medical attention for children with frequent infections and other concerning symptoms.
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This question is part of the following fields:
- Children And Young People
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Question 13
Incorrect
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A 15-year-old girl, with Down's syndrome, has complained of neck pain. The pain began after she fell while playing basketball. Her parents have noticed that she has been experiencing more falls lately.
During the examination, she displays tenderness throughout her neck muscles and limited neck mobility.
What is the MOST SUITABLE course of action to take next?Your Answer: Out patient cervical spine x ray
Correct Answer: Refer to on-call orthopaedic spinal team
Explanation:Warning Signs of Craniovertebral Instability in Down’s Syndrome
Warning signs of craniovertebral instability or myelopathy in individuals with Down’s syndrome include neck pain, abnormal head posture, reduced neck movements, deterioration of gait, increased frequency of falls, and deterioration of manipulative skills. While the term atlantoaxial instability is sometimes used, occipitoatlantal subluxation is also a concern, making craniovertebral instability the preferred term.
Cervical spine x-rays are often unreliable, and primary care referrals can result in delays in reporting. Therefore, any clinical abnormality should be enough to warrant a referral to a specialist team. While neck exercises, simple analgesia, and physiotherapy may be helpful in cases of muscular neck pain, it is important to rule out craniovertebral instability first. Early detection and intervention can prevent further complications and improve outcomes for individuals with Down’s syndrome.
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This question is part of the following fields:
- Musculoskeletal Health
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Question 14
Incorrect
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A 29-year-old woman had presented with occasional palpitations, sweating and restlessness. An ECG had shown sinus tachycardia.
Her blood tests had showed:
Thyroid stimulating hormone (TSH) 0.2 mU/L (0.5-5.5)
Free thyroxine (T4) 23 pmol/L (9.0 - 18)
You had started her on a beta-blocker and referred her to secondary care for specialist treatment. However, the patient returns to you stating that her appointment is in 4 months' time and she cannot carry on with her symptoms for that long.
What is the most appropriate course of action?Your Answer: Start levothyroxine
Correct Answer: Start carbimazole
Explanation:This young female patient is likely suffering from Graves’ disease, causing hyperthyroidism and symptoms such as sweating, palpitations, and restlessness. A low TSH and high T4 confirm the diagnosis, along with positive TRAbs. While waiting for secondary care, starting carbimazole is the appropriate course of action to alleviate symptoms. Seeking senior or remote specialist advice can help with prescribing. Referring to the emergency department is unnecessary as the palpitations are occasional and the ECG shows sinus tachycardia. Starting amiodarone is not recommended as it can cause thyroid dysfunction and the ECG shows sinus tachycardia, not atrial fibrillation. Continuing to wait for secondary care review doesn’t address the patient’s symptoms and concerns.
Management of Graves’ Disease
Despite numerous trials, there is no clear consensus on the optimal management of Graves’ disease. Treatment options include anti-thyroid drugs (ATDs), radioiodine treatment, and surgery. In recent years, ATDs have become the most popular first-line therapy for Graves’ disease. This is particularly true for patients with significant symptoms of thyrotoxicosis or those at risk of hyperthyroid complications, such as elderly patients or those with cardiovascular disease.
To control symptoms, propranolol is often used to block the adrenergic effects. NICE Clinical Knowledge Summaries recommend that patients with Graves’ disease be referred to secondary care for ongoing treatment. If symptoms are not controlled with propranolol, carbimazole should be considered in primary care.
ATD therapy involves starting carbimazole at 40 mg and gradually reducing it to maintain euthyroidism. This treatment is typically continued for 12-18 months. The major complication of carbimazole therapy is agranulocytosis. An alternative regime, called block-and-replace, involves starting carbimazole at 40 mg and adding thyroxine when the patient is euthyroid. This treatment typically lasts for 6-9 months. Patients following an ATD titration regime have been shown to suffer fewer side-effects than those on a block-and-replace regime.
Radioiodine treatment is often used in patients who relapse following ATD therapy or are resistant to primary ATD treatment. Contraindications include pregnancy (should be avoided for 4-6 months following treatment) and age < 16 years. Thyroid eye disease is a relative contraindication, as it may worsen the condition. The proportion of patients who become hypothyroid depends on the dose given, but as a rule, the majority of patients will require thyroxine supplementation after 5 years.
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This question is part of the following fields:
- Metabolic Problems And Endocrinology
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Question 15
Incorrect
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A 37-year-old woman with painful swollen metacarpo-phalangeal joints on both hands for the last three weeks presents in surgery.
What is the most appropriate investigation in this case?Your Answer: Plain radiograph
Correct Answer: C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)
Explanation:Investigations for Suspected Rheumatoid Arthritis
When a patient is suspected to have rheumatoid arthritis, urgent referral to secondary care is necessary. While investigations may be carried out in primary care, they should not delay the referral process. The most appropriate investigation for this condition is rheumatoid factor, which is positive in 60-70% of people with rheumatoid arthritis. However, in this question, CRP or ESR are the most appropriate investigations for the initial acute phase. These are inflammatory markers that may support the clinical suspicion if elevated.
Other investigations, such as Antinuclear antibodies, HLA-B27 testing, plain radiograph, and total immunoglobulin E levels, are not useful in this case. ANAs may suggest connective tissue diseases, but they are not a useful test at this stage. HLA-B27 testing may be appropriate for reactive arthritis or ankylosing spondylitis, but these diseases do not present similarly to rheumatoid arthritis. Plain radiograph may be useful early in the course of the disease, but it is unlikely to be arranged by a general practitioner if urgent referral to secondary care has been made. Total immunoglobulin E levels are measured in allergic disease and are not relevant to rheumatoid arthritis.
Investigations for Suspected Rheumatoid Arthritis: What to Consider and What to Avoid
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This question is part of the following fields:
- Musculoskeletal Health
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Question 16
Incorrect
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A 65-year-old carpenter presents to you with concerns about his thumb nail that has been black for a few weeks. He suspects that he may have injured the nail while working, but he expected the discoloration to have disappeared by now. Upon examination, you notice a dark stripe running along the length of the nail plate of his left thumb. The adjacent nail fold is also dark.
What would be the best course of action for managing this condition?Your Answer: Refer to the minor operations clinic at the surgery next week for nail plate removal
Correct Answer: Urgent referral (2 week wait) to dermatology
Explanation:If a new pigmented line appears in a nail, especially if there is damage to the nail, it is important to be highly suspicious of subungual melanoma and seek urgent referral. Subungual melanoma is a type of acral-lentiginous melanoma that can be mistaken for trauma. It typically presents as a longitudinal, pigmented band on the nail, with wider bands being more likely to be melanoma. Hutchinson’s sign, where the pigment extends onto the nail fold, may also be present. The lesion may also cause ulceration and destruction of the nail-plate.
Malignant melanoma is a type of skin cancer that has four main subtypes: superficial spreading, nodular, lentigo maligna, and acral lentiginous. Nodular melanoma is the most aggressive, while the other forms spread more slowly. Superficial spreading melanoma typically affects young people on sun-exposed areas such as the arms, legs, back, and chest. Nodular melanoma appears as a red or black lump that bleeds or oozes and affects middle-aged people. Lentigo maligna affects chronically sun-exposed skin in older people, while acral lentiginous melanoma appears on nails, palms, or soles in people with darker skin pigmentation. Other rare forms of melanoma include desmoplastic melanoma, amelanotic melanoma, and melanoma arising in other parts of the body such as ocular melanoma.
The main diagnostic features of melanoma are changes in size, shape, and color. Secondary features include a diameter of 7mm or more, inflammation, oozing or bleeding, and altered sensation. Suspicious lesions should undergo excision biopsy, and the lesion should be completely removed to facilitate subsequent histopathological assessment. Once the diagnosis is confirmed, the pathology report should be reviewed to determine whether further re-excision of margins is required. The margins of excision are related to Breslow thickness, with lesions 0-1 mm thick requiring a margin of 1 cm, lesions 1-2 mm thick requiring a margin of 1-2cm (depending on site and pathological features), lesions 2-4mm thick requiring a margin of 2-3 cm (depending on site and pathological features), and lesions over 4mm thick requiring a margin of 3 cm. Further treatments such as sentinel lymph node mapping, isolated limb perfusion, and block dissection of regional lymph node groups should be selectively applied.
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This question is part of the following fields:
- Dermatology
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Question 17
Incorrect
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A 50-year-old man with a history of hypertension, psoriasis, and bipolar disorder visits his doctor complaining of a thick scaly patch on his right knee that appeared after starting a new medication.
Which of the following drugs is most likely responsible for exacerbating his rash?Your Answer: Clindamycin
Correct Answer: Lithium
Explanation:Lithium has been found to potentially worsen psoriasis symptoms.
Psoriasis can be worsened by various factors, including trauma, alcohol consumption, and certain medications such as beta blockers, lithium, antimalarials (chloroquine and hydroxychloroquine), NSAIDs, ACE inhibitors, and infliximab. Additionally, the sudden withdrawal of systemic steroids can also exacerbate psoriasis symptoms. It is important to note that streptococcal infection can trigger guttate psoriasis, a type of psoriasis characterized by small, drop-like lesions on the skin. Therefore, individuals with psoriasis should be aware of these exacerbating factors and take steps to avoid or manage them as needed.
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This question is part of the following fields:
- Dermatology
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Question 18
Incorrect
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A 42-year-old woman comes to your clinic complaining of an insect bite on her left ankle that has been getting increasingly itchy. Despite using over-the-counter creams, she has not seen any improvement. Her ankle is surrounded by a significant area of redness measuring approximately 12 cm in diameter. She reports no fever and has been in good health otherwise.
What is the next course of action in managing her condition?Your Answer: Soft paraffin 13.2% cream
Correct Answer: Oral loratadine
Explanation:Cream is a highly effective topical corticosteroid that can be utilized for the treatment of bite reactions. However, for milder cases, hydrocortisone 1 may be sufficient.
Animal bites are a common occurrence in everyday practice, with dogs and cats being the most frequent culprits. These bites are usually caused by multiple types of bacteria, with Pasteurella multocida being the most commonly isolated organism. To manage these bites, it is important to cleanse the wound thoroughly. Puncture wounds should not be sutured unless there is a risk of cosmesis. The current recommendation is to use co-amoxiclav, but if the patient is allergic to penicillin, doxycycline and metronidazole are recommended.
On the other hand, human bites can cause infections from a variety of bacteria, including both aerobic and anaerobic types. Common organisms include Streptococci spp., Staphylococcus aureus, Eikenella, Fusobacterium, and Prevotella. To manage these bites, co-amoxiclav is also recommended. It is important to consider the risk of viral infections such as HIV and hepatitis C when dealing with human bites.
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This question is part of the following fields:
- Infectious Disease And Travel Health
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Question 19
Correct
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A 28-year-old woman is 32 weeks pregnant. She visits surgery with worries about reduced fetal movement. You decide to refer her to the maternal health unit.
What would be the most suitable initial investigation to perform?Your Answer: Handheld Doppler for fetal heartbeat
Explanation:When a pregnant woman reports reduced fetal movements, it is important to investigate the cause as it can indicate a risk of stillbirth and fetal growth restriction. The first step in this investigation should be to use a handheld Doppler to confirm the presence of a fetal heartbeat.
If a fetal heartbeat is detected with the handheld Doppler and the pregnancy is over 28 weeks gestation, a CTG should be used to monitor the fetal heart rate for at least 20 minutes to assess for any fetal compromise.
The guidelines recommend assessing fetal movements based on the subjective perception of the mother. If a mother reports reduced fetal movements, there is no need for further counting of fetal movements.
If no fetal heartbeat is detected with the handheld Doppler, an immediate ultrasound should be offered. If there is still concern about reduced fetal movements despite a normal CTG, an urgent ultrasound can be used to assess abdominal circumference or estimated fetal weight and amniotic fluid volume measurement, rather than ultrasound with Doppler.
Understanding Reduced Fetal Movements
Reduced fetal movements can indicate fetal distress and are a cause for concern as they can lead to stillbirth and fetal growth restriction. It is believed that there may also be a link between reduced fetal movements and placental insufficiency. Fetal movements usually start between 18-20 weeks gestation and increase until 32 weeks gestation, after which the frequency of movement tends to plateau. Multiparous women may experience fetal movements sooner, from 16-18 weeks gestation. Fetal movements should not reduce towards the end of pregnancy.
There is no established definition for what constitutes reduced fetal movements, but the RCOG considers less than 10 movements within 2 hours (in pregnancies past 28 weeks gestation) an indication for further assessment. Reduced fetal movements are a fairly common presentation, affecting up to 15% of pregnancies. Risk factors for reduced fetal movements include posture, distraction, placental position, medication, fetal position, body habitus, amniotic fluid volume, and fetal size.
Investigations for reduced fetal movements are dependent on gestation at onset. If past 28 weeks gestation, handheld Doppler should be used to confirm fetal heartbeat. If no fetal heartbeat is detectable, immediate ultrasound should be offered. If fetal heartbeat is present, CTG should be used for at least 20 minutes to monitor fetal heart rate which can assist in excluding fetal compromise. If concern remains, despite normal CTG, urgent (within 24 hours) ultrasound can be used. If between 24 and 28 weeks gestation, a handheld Doppler should be used to confirm the presence of fetal heartbeat. If below 24 weeks gestation, and fetal movements have previously been felt, a handheld Doppler should be used. If fetal movements have not yet been felt by 24 weeks, onward referral should be made to a maternal fetal medicine unit.
While reduced fetal movements can be a cause for concern, in 70% of pregnancies with a single episode of reduced fetal movement, there is no onward complication. However, between 40-55% of women who suffer from stillbirth experience reduced fetal movements prior to diagnosis. Therefore, it is important for expectant mothers to be aware of their baby’s movements and seek medical attention if they notice a decrease in fetal movements.
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This question is part of the following fields:
- Maternity And Reproductive Health
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Question 20
Correct
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A 28-year-old man comes in for a routine check-up with his GP. He is a non-smoker and has been feeling generally well. However, he has noticed that his gums have been bleeding when he brushes his teeth. He admits that he has been under a lot of stress lately and has not been brushing his teeth as regularly as he should.
Upon examination, there are no signs of ulceration or leukoplakia. The margins of his gums appear red but are not actively bleeding. There is no evidence of a dental abscess, and he has no fever.
What would be the most appropriate course of action based on his current presentation?Your Answer: Advise he should arrange routine dental review
Explanation:Patients who present with gingivitis should be advised to regularly visit a dentist for routine check-ups. Antibiotics are typically not necessary for this condition.
There is no need for urgent dental review, as there are no signs of acute necrotizing ulcerative gingivitis or oral malignancy. Benzydamine mouthwash may provide temporary pain relief, but it is not recommended for gingivitis. Chlorhexidine mouthwash may be used as an adjunct to dental review and antibiotic therapy for necrotizing ulcerative gingivitis.
In cases of simple gingivitis, antibiotics are generally not prescribed.
Understanding Gingivitis and its Management
Gingivitis is a dental condition that is commonly caused by poor oral hygiene. It is characterized by red and swollen gums that bleed easily. In severe cases, it can lead to acute necrotizing ulcerative gingivitis, which is accompanied by painful bleeding gums, bad breath, and ulcers on the gums.
For patients with simple gingivitis, regular dental check-ups are recommended, and antibiotics are usually not necessary. However, for those with acute necrotizing ulcerative gingivitis, it is important to seek immediate dental attention. In the meantime, oral metronidazole or amoxicillin may be prescribed for three days, along with chlorhexidine or hydrogen peroxide mouthwash and simple pain relief medication.
It is crucial to maintain good oral hygiene to prevent gingivitis from developing or worsening. This includes brushing teeth twice a day, flossing daily, and using mouthwash regularly. By understanding the causes and management of gingivitis, individuals can take steps to protect their oral health and prevent complications.
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This question is part of the following fields:
- Ear, Nose And Throat, Speech And Hearing
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Question 21
Incorrect
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An 85-year-old man patient of yours is discharged from hospital after receiving treatment for a urinary tract infection.
Three days after discharge the lab calls you to say that they received a urine sample before his discharge and there was E. coli present in the urine. However, there are no signs of infection. You call the man back to your surgery to check that he is okay. He has no pain while urinating and says he feels much better.
Which of the following is the best course of action?Your Answer: Re-admit to hospital
Correct Answer: Treatment with vancomycin
Explanation:Management of Asymptomatic Clostridium difficile Infection
A watch and wait policy is recommended for patients with asymptomatic Clostridium difficile infection. Mild cases may not require specific antibiotic treatment, but if necessary, oral metronidazole is the preferred option (dose: 400-500 mg tds for 10-14 days). This has been shown to be as effective as oral vancomycin in mild to moderate cases.
For those who wish to read in greater detail, the link below contains the latest guidance and analysis. However, it is important to note that the information provided is more detailed than what is required for the average GP and only a broad understanding of the management and national recommendations is expected for the exam.
In this case, the patient is asymptomatic and there are no toxins present, therefore no treatment is necessary.
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This question is part of the following fields:
- Older Adults
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Question 22
Incorrect
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A 68-year-old woman presents with a 2-day history of left earache, vertigo and loss of taste. There is left-sided weakness of both the upper and the lower facial muscles. Facial sensation is normal. There is a vesicular rash on the eardrum, ear canal, earlobe, tongue and roof of the mouth (palate) on the same side as the weakness of the face.
Select the single most likely diagnosis.Your Answer: Otitis media
Correct Answer: Ramsay Hunt syndrome
Explanation:Understanding Ramsay Hunt Syndrome and Other Facial Nerve Conditions
Ramsay Hunt syndrome is a condition caused by the reactivation of the varicella zoster virus in the geniculate ganglion of the facial nerve. This can lead to ear pain, hearing loss, vertigo, facial nerve paralysis, and even involvement of other cranial nerves. The presence of lymphocytes in the cerebrospinal fluid and vesicles on the skin of the ear canal or pinna may also be observed. However, it is important to note that this condition can also occur without a skin rash.
Bell’s palsy, on the other hand, is the most common cause of unilateral facial nerve paralysis. It may also present with otalgia and pain behind the ear, but vesiculation is absent. Acute otitis media can also lead to facial paralysis, but this usually responds well to antibiotics and corticosteroids.
Postherpetic neuralgia is a nerve pain that occurs after the herpes zoster vesicles have crusted over and begun to heal. However, the description provided doesn’t suggest that this stage has been reached. Trigeminal neuralgia, on the other hand, is characterised by recurrent episodes of facial pain following the sensory distribution of the trigeminal nerve, but without facial paralysis or rash.
It is important to understand the differences between these conditions in order to properly diagnose and treat them. While some may share similar symptoms, the underlying causes and treatments can vary greatly.
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This question is part of the following fields:
- Neurology
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Question 23
Incorrect
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You have recommended a 60-year-old patient to purchase over-the-counter vitamin D at a dose of 10 micrograms. Later that day, the patient contacts you to inquire about the required dose in International Units since all medication labels at their local pharmacy are in this form.
To convert Vitamin D dose from International Units to micrograms, divide the number of units by 40.
What is the equivalent number of International Units for 10 mcg of Vitamin D?Your Answer: 40
Correct Answer: 0.25
Explanation:Common Mistakes in AKT Exams
A common mistake made by candidates in RCGP AKT exams is making silly errors when performing simple calculations. This often results in incorrect answers. However, at onExamination, we have noticed that candidates also tend to misread questions, leading to incorrect answers.
For instance, in a dose conversion question, candidates were asked to convert mcg to IU, but some failed to notice this and divided the 10 mcg dose by 40, resulting in an incorrect answer of 0.25. The correct method would have been to multiply the 10 mcg dose by 40 to convert to IU, giving the correct answer of 400.
To avoid such errors, the RCGP advises candidates to do a reality check after their calculation. For example, if you are familiar with the CKS NICE recommended adult intake of Vitamin D (which is 400 IU), you should be able to recognize that 0.25 is not the correct answer and double-check your calculation. By paying attention to details and doing a reality check, candidates can avoid making common mistakes in AKT exams.
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This question is part of the following fields:
- Metabolic Problems And Endocrinology
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Question 24
Incorrect
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A 6-year-old boy comes to his General Practitioner with his mother and stepfather. He has a 2-month history of intermittent abdominal pain. The pain is colicky in nature and periumbilical. His appetite is slightly reduced. He is not constipated. The pain is causing him to miss some school, but he also experiences it at the weekend. The patient is otherwise normal and his height and weight are on the 50th centile.
What is the most likely diagnosis?Your Answer: School refusal
Correct Answer: Functional abdominal pain
Explanation:Functional abdominal pain is a common condition among children, affecting up to 25% of them. It is characterized by pain in the abdominal area that is not caused by any organic factors. Symptoms that may indicate a non-organic cause include pain near the belly button, absence of other gastrointestinal symptoms, no disturbance in sleep, normal physical examination, and the child’s overall well-being. In most cases, a thorough history, examination, and explanation are sufficient to manage the condition. However, if the symptoms persist, referral to a pediatrician and further investigations may be necessary to rule out organic causes. School refusal is a psychological disorder that causes severe anxiety in children when attending school or being separated from their parents. Abdominal pain may be a symptom, but it is not usually experienced on weekends. Abdominal migraine is characterized by sudden episodes of intense pain in the periumbilical area, lasting for at least an hour, accompanied by anorexia, nausea, vomiting, headache, photophobia, or pallor. Intussusception is a rare condition that occurs mostly in infants aged five to ten months, making it unlikely to be the diagnosis for this patient. Irritable bowel syndrome is also unlikely as the patient has no changes in bowel habits.
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This question is part of the following fields:
- Children And Young People
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Question 25
Incorrect
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You assess a 48-year-old woman who has recently been diagnosed with rheumatoid arthritis. She was initiated on methotrexate three months ago and prednisolone was added to achieve quick symptom control. Currently, she is taking methotrexate 15mg once a week and prednisolone 10 mg once daily. However, she is encountering several adverse effects. What is the most probable side effect caused by prednisolone?
Your Answer: 'Diarrhoea'
Correct Answer: 'My shoulder and leg muscles feel weak'
Explanation:Proximal myopathy is a frequent occurrence in individuals who use steroids for an extended period. It is possible that some of the other adverse effects are a result of either the ongoing rheumatoid disease or the use of methotrexate.
Corticosteroids are commonly prescribed medications that can be taken orally or intravenously, or applied topically. They mimic the effects of natural steroids in the body and can be used to replace or supplement them. However, the use of corticosteroids is limited by their numerous side effects, which are more common with prolonged and systemic use. These side effects can affect various systems in the body, including the endocrine, musculoskeletal, gastrointestinal, ophthalmic, and psychiatric systems. Some of the most common side effects include impaired glucose regulation, weight gain, osteoporosis, and increased susceptibility to infections. Patients on long-term corticosteroids should have their doses adjusted during intercurrent illness, and the medication should not be abruptly withdrawn to avoid an Addisonian crisis. Gradual withdrawal is recommended for patients who have received high doses or prolonged treatment.
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This question is part of the following fields:
- Musculoskeletal Health
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Question 26
Incorrect
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A 21-year-old female is prescribed a 7 day course of penicillin for tonsillitis. She is currently taking Microgynon 30. What advice should be given regarding contraception?
Your Answer: Use condoms for 21 days
Correct Answer: There is no need for extra protection
Explanation:Special Situations for Combined Oral Contraceptive Pill
Concurrent Antibiotic Use:
In the UK, doctors have previously advised that taking antibiotics concurrently with the combined oral contraceptive pill may interfere with the enterohepatic circulation of oestrogen, making the pill ineffective. As a result, extra precautions were advised during antibiotic treatment and for seven days afterwards. However, this approach is not taken in the US or most of mainland Europe. In 2011, the Faculty of Sexual & Reproductive Healthcare updated their guidelines, abandoning the previous approach. The latest edition of the British National Formulary (BNF) has also been updated in line with this guidance. Precautions should still be taken with enzyme-inducing antibiotics such as rifampicin.Switching Combined Oral Contraceptive Pills:
The BNF and Faculty of Sexual & Reproductive Healthcare (FSRH) appear to give contradictory advice on switching combined oral contraceptive pills. The Clinical Effectiveness Unit of the FSRH has stated in the Combined Oral Contraception guidelines that the pill-free interval doesn’t need to be omitted. However, the BNF advises missing the pill-free interval if the progesterone changes. Given the uncertainty, it is best to follow the BNF. -
This question is part of the following fields:
- Gynaecology And Breast
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Question 27
Incorrect
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A 32-year-old woman visits her doctor after missing her desogestrel contraceptive pill (progestogen only) this morning and is uncertain about what to do. She typically takes the pill at approximately 0900, and it is now 1430. What guidance should be provided?
Your Answer: Take missed pill now and advise condom use until pill taking re-established for 48 hours
Correct Answer: Take missed pill now and no further action needed
Explanation:Since desogestrel has a 12-hour window, the patient can take the pill now without requiring any additional steps.
The progestogen only pill (POP) has simpler rules for missed pills compared to the combined oral contraceptive pill. It is important to not confuse the two. For traditional POPs such as Micronor, Noriday, Norgeston, and Femulen, as well as Cerazette (desogestrel), if a pill is less than 3 hours late, no action is required and pill taking can continue as normal. However, if a pill is more than 3 hours late (i.e. more than 27 hours since the last pill was taken), action is needed. If a pill is less than 12 hours late, no action is required. But if a pill is more than 12 hours late (i.e. more than 36 hours since the last pill was taken), action is needed.
If action is needed, the missed pill should be taken as soon as possible. If more than one pill has been missed, only one pill should be taken. The next pill should be taken at the usual time, which may mean taking two pills in one day. Pill taking should continue with the rest of the pack. Extra precautions, such as using condoms, should be taken until pill taking has been re-established for 48 hours.
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This question is part of the following fields:
- Maternity And Reproductive Health
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Question 28
Incorrect
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A 75-year-old man is experiencing alcohol withdrawal syndrome. What class of drugs would be the most suitable for treatment?
Your Answer: Selective noradrenaline reuptake inhibitor
Correct Answer: Barbiturate
Explanation:Benzodiazepines for Alcohol Withdrawal Syndrome
Benzodiazepines are the preferred first line treatment for alcohol withdrawal syndrome. The two most commonly used benzodiazepines in primary care are chlordiazepoxide and diazepam. However, chlordiazepoxide is the preferred option due to its longer half-life and lower potential for abuse.
Both chlordiazepoxide and diazepam are equally effective in treating alcohol withdrawal syndrome. However, it is recommended that patients using diazepam are supervised by someone else during the detoxification period.
The NHS National Library for Health provides helpful information on alcohol detoxification, including a suggested tapering dose regime.
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This question is part of the following fields:
- Smoking, Alcohol And Substance Misuse
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Question 29
Incorrect
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A 28 year-old woman comes to the clinic with complaints of persistent itching. She has a past medical history of eczema and uses emollients regularly, but to no avail. She is currently 20 weeks pregnant. During the physical examination, there are signs of excoriation on her hands, but no apparent visible dermatitis. What is the most crucial test to request?
Your Answer: Dermatoscopy
Correct Answer: Liver function tests
Explanation:Pruritus is a common occurrence during pregnancy, affecting up to 25% of women. It can be caused by various factors such as eczema, polymorphic eruption of pregnancy, or changes in circulation due to skin stretching. However, if pruritus is present without a rash, it may indicate obstetric cholestasis, a serious condition that can lead to complications like prematurity, meconium passage, postpartum hemorrhage, and even stillbirth. Therefore, liver function tests and bile acid tests are crucial in diagnosing this condition. Additionally, pruritus can also be a symptom of iron deficiency anemia, so a full blood count should also be considered.
Jaundice During Pregnancy
During pregnancy, jaundice can occur due to various reasons. One of the most common liver diseases during pregnancy is intrahepatic cholestasis of pregnancy, which affects around 1% of pregnancies and is usually seen in the third trimester. Symptoms include itching, especially in the palms and soles, and raised bilirubin levels. Ursodeoxycholic acid is used for symptomatic relief, and women are typically induced at 37 weeks. However, this condition can increase the risk of stillbirth.
Acute fatty liver of pregnancy is a rare complication that can occur in the third trimester or immediately after delivery. Symptoms include abdominal pain, nausea, vomiting, headache, jaundice, and hypoglycemia. ALT levels are typically elevated. Supportive care is the initial management, and delivery is the definitive management once the patient is stabilized.
Gilbert’s and Dubin-Johnson syndrome may also be exacerbated during pregnancy. Additionally, HELLP syndrome, which stands for Haemolysis, Elevated Liver enzymes, Low Platelets, can also cause jaundice during pregnancy. It is important to monitor liver function tests and seek medical attention if any symptoms of jaundice occur during pregnancy.
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This question is part of the following fields:
- Maternity And Reproductive Health
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Question 30
Incorrect
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A 63-year-old man presents to the emergency department with a three day history of feeling unwell, dysuria, and increased frequency of urination. He denies any macroscopic hematuria. Upon further questioning, he reports having long-standing lower urinary tract symptoms such as weakened urinary stream, hesitancy, urgency, and nocturia for the past year, which have slowly worsened. On examination, he appears well with no abdominal or loin tenderness. Urine dipstick shows nitrites positive and leukocytes+++. A diagnosis of urinary tract infection is made, and he is treated with oral antibiotics. The patient expresses interest in having a digital rectal examination and prostate-specific antigen (PSA) blood test to evaluate his lower urinary tract symptoms. A digital rectal examination reveals a smoothly enlarged benign-feeling prostate. When would be the most appropriate time to perform a PSA blood test in this case?
Your Answer:
Correct Answer: Postpone the test for at least 48 hours
Explanation:Factors Affecting Prostate-Specific Antigen Blood Test
The prostate-specific antigen (PSA) blood test is a common diagnostic tool used to detect prostate cancer. However, the test results can be influenced by various factors, including benign prostatic hypertrophy, prostatitis, urinary retention, urinary tract infection, old age, urethral or rectal instrumentation/examination, recent vigorous exercise, and recent ejaculation.
It is important to note that the PSA test should be deferred for at least a month in individuals with a proven urinary tract infection. Additionally, if a man has ejaculated or exercised vigorously in the previous 48 hours, the test should also be deferred. While some sources suggest delaying PSA testing for at least a week after a digital rectal examination, data suggest that rectal examination has minimal effect on PSA levels.
In summary, it is crucial to consider these factors when interpreting PSA test results to ensure accurate diagnosis and treatment.
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This question is part of the following fields:
- Kidney And Urology
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