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Question 1
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A 42-year-old man, known to have human immunodeficiency virus (HIV), attends his regular clinic appointment. He has missed an earlier appointment and is poorly compliant with his antiretroviral therapy, which he puts down to his busy work schedule. He has recently noticed blotches on his nose. His partner reports that the patient also has similar lesions on his back.
On examination, you note several red-purple papules across the patient’s back and face.
Which of the following viruses may have caused these lesions?Your Answer: Human herpesvirus 8
Explanation:The patient has Kaposi’s sarcoma, which is caused by human herpesvirus 8. This condition can be the first presentation of AIDS in some HIV patients and is more common in males and men who have sex with men. The skin lesions appear as red-purple papules or plaques and can also be found on mucous membranes. Kaposi’s sarcoma mainly affects the skin, but it can also affect the lungs and gastrointestinal tract. Symptoms of pulmonary Kaposi’s sarcoma include cough, shortness of breath, and haemoptysis, while gastrointestinal involvement can cause intestinal obstruction.
CMV infection can occur as reactivation or primary infection, usually in those with low CD4+ counts. In the immunocompromised, it can present with chorioretinitis, encephalitis, pneumonitis, or gastrointestinal disease. HPV is a common virus that causes genital warts, verrucas, and warts on the lips/oral mucosa. It is also a major risk factor for cervical and anal cancers. In immunosuppressed patients, the severity of HPV symptoms and risk of cancer are increased. HSV 1 and 2 are common viruses that can cause oral and genital herpes. In immunosuppression, these viruses may reactivate more frequently and cause more severe symptoms. Cryptococcus neoformans is a fungus that can cause opportunistic infections in AIDS, mostly causing fungal pneumonia and subacute meningitis, but it does not typically cause skin lesions.
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This question is part of the following fields:
- Infectious Diseases
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Question 2
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A 35-year-old woman comes to the surgery to renew her prescription for oral contraception. She is in good health, has no symptoms, and is not taking any medications. She does not smoke and has a BMI of 23 kg/m2. However, her blood pressure has been measured at 170/100 mmHg on multiple occasions. A thorough physical examination reveals no abnormalities, and her medical records show no history of hypertension.
The following test results were obtained:
- Sodium: 145 mmol/L (normal range: 137-144)
- Potassium: 2.9 mmol/L (normal range: 3.5-4.9)
- Urea: 4.0 mmol/L (normal range: 2.5-7.5)
- Creatinine: 89 mol/L (normal range: 60-110)
- Bicarbonate: 35 mmol/L (normal range: 20-28)
What is the most likely cause of her visit to the surgery?Your Answer: Conn's syndrome
Explanation:Diagnosis of Primary Hyperaldosteronism
Primary hyperaldosteronism, also known as Conn’s syndrome, is the most likely diagnosis for a young patient with hypertension, hypokalaemia, and alkalosis. While the prevalence of this condition in unselected hypertensive patients is around 2%, it should be actively excluded in patients with these symptoms. A spot urine potassium test can be used as an initial investigation for hypokalaemia, with a level above 30 mmol/l indicating that GI loss and laxative abuse are unlikely. An elevated aldosterone:renin ratio is present in primary hyperaldosteronism, and blood test requirements should be discussed with the laboratory before investigation.
While diuretic abuse can cause hypokalaemia, it is much less common than primary hyperaldosteronism, and hypertension is not typically present. Cushing’s syndrome, which is associated with hypokalaemia and alkalosis, can be screened for with a 24-hour urinary cortisol test, but this condition is less likely in a patient without other features of the syndrome. Addison’s disease, or hypoadrenalism, can be screened for with a short Synacthen test, which is used to detect hyperpigmentation, hypotension, hyponatraemia, and hyperkalaemia.
In summary, primary hyperaldosteronism should be considered as a potential diagnosis in young patients with hypertension, hypokalaemia, and alkalosis. Proper testing and screening can help rule out other potential causes of these symptoms.
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This question is part of the following fields:
- Clinical Sciences
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Question 3
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A 60-year-old woman received a blood transfusion of 2 units of crossmatched blood 1 hour ago, following acute blood loss. She reports noticing a funny feeling in her chest, like her heart keeps missing a beat. You perform an electrocardiogram (ECG) which shows tall, tented T-waves and flattened P-waves in multiple leads.
An arterial blood gas (ABG) test shows:
Investigation Result Normal value
Sodium (Na+) 136 mmol/l 135–145 mmol/l
Potassium (K+) 7.1 mmol/l 5–5.0 mmol/l
Chloride (Cl–) 96 mmol/l 95–105 mmol/l
Given the findings, what treatment should be given immediately?Your Answer: Calcium gluconate
Explanation:Treatment Options for Hyperkalaemia: Understanding the Role of Calcium Gluconate, Insulin and Dextrose, Calcium Resonium, Nebulised Salbutamol, and Dexamethasone
Hyperkalaemia is a condition characterized by high levels of potassium in the blood, which can lead to serious complications such as arrhythmias. When a patient presents with hyperkalaemia and ECG changes, the initial treatment is calcium gluconate. This medication stabilizes the myocardial membranes by reducing the excitability of cardiomyocytes. However, it does not reduce potassium levels, so insulin and dextrose are needed to correct the underlying hyperkalaemia. Insulin shifts potassium intracellularly, reducing serum potassium levels by 0.6-1.0 mmol/l every 15 minutes. Nebulised salbutamol can also drive potassium intracellularly, but insulin and dextrose are preferred due to their increased effectiveness and decreased side-effects. Calcium Resonium is a slow-acting treatment that removes potassium from the body by binding it and preventing its absorption in the gastrointestinal tract. While it can help reduce potassium levels in the long term, it is not effective in protecting the patient from arrhythmias acutely. Dexamethasone, a steroid, is not useful in the treatment of hyperkalaemia. Understanding the role of these treatment options is crucial in managing hyperkalaemia and preventing serious complications.
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This question is part of the following fields:
- Cardiology
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Question 4
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A couple has a 7-year-old son and are worried that he may have inherited the gene for Huntington's disease. The father was diagnosed with the disease when he was 33 years old, while the mother has been tested and found not to be a carrier of the gene. What is the probability that their son will develop Huntington's disease?
Your Answer: 1 in 2
Explanation:The Genetics of Huntington’s Disease
Huntington’s disease is a degenerative neurological disease that is inherited in an autosomal dominant manner. This means that only one copy of the faulty gene is needed for an individual to develop the disease. In the case of a heterozygous father and a mother without copies of the gene, there is a 50% chance that their offspring will inherit the faulty gene and develop the disease.
Symptoms of Huntington’s disease typically appear in early middle age and include unsteady gait, involuntary movements, behavioral changes, and progressive dementia. The defective gene responsible for the disease is located on chromosome 4, and there is a phenomenon known as genetic anticipation where the disease can manifest earlier in life in subsequent generations.
Fortunately, genetic screening is now available to identify individuals who carry the faulty gene. This can help individuals make informed decisions about family planning and allow for early intervention and treatment. The genetics of Huntington’s disease is crucial for individuals and families affected by the disease.
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This question is part of the following fields:
- Clinical Sciences
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Question 5
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A 42-year-old woman presents to the Menstrual Disturbance Clinic with a complaint of abnormal pain and heavy menstrual bleeding for the past 5 years. She reports that the pain is most severe just before and during the first day of her period and that she has been passing clots. During the examination, the physician notes thickening of the uterosacral ligament and enlargement of the ovaries. Laparoscopic examination reveals the presence of 'chocolate cysts'.
What is the probable diagnosis?Your Answer: Endometriosis
Explanation:Understanding Pelvic Conditions: Endometriosis, Adenomyosis, Fibroids, PCOS, and Chronic Pelvic Infection
Pelvic conditions can cause discomfort and pain for many women. Endometriosis is a common condition where tissue resembling the endometrium grows outside the endometrial cavity, often in the pelvis. Laparoscopy may reveal chocolate cysts and a thickened uterosacral ligament. Symptoms include continuous pelvic pain, colicky dysmenorrhoea, heavy menstrual loss, and clotting.
Adenomyosis occurs when endometrial tissue infiltrates the uterus muscle. Symptoms include dysmenorrhoea and menorrhagia. Laparoscopy may reveal subserosal endometrium, but no chocolate cysts or thickened uterosacral ligament.
Fibroids cause a bulky uterus on bimanual examination and menorrhagia, but not chocolate cysts or a bulky uterine ligament.
Polycystic ovarian syndrome (PCOS) symptoms include oligomenorrhoea, hirsutism, weight gain, and polycystic ovaries on ultrasound. Chocolate cysts and a thickened uterosacral ligament are not associated with PCOS.
Chronic pelvic infection presents with deep dyspareunia and chronic discharge, but not chocolate cysts or a thickened uterosacral ligament. Understanding these conditions can help women seek appropriate treatment and manage their symptoms.
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This question is part of the following fields:
- Gynaecology
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Question 6
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A 28-year-old woman visits her GP seeking the combined oral contraceptive pill. She experiences intense one-sided headaches and reports a tingling sensation that travels up her arm before the headache begins. She smokes 10-20 cigarettes on most weekends and has a BMI of 34 kg/m². Her younger sister has a history of thromboembolic disease. What specific aspect of her medical history is the most significant contraindication for prescribing the combined oral contraceptive?
Your Answer: Migraine with aura
Explanation:The patient’s symptoms indicate that they may be suffering from migraine, specifically migraine with aura. This condition is classified as UKMEC 4, meaning that it poses a significant health risk when taking combined oral contraceptive pills. While visual disturbances are the most common aura symptoms, some patients may experience sensory or motor symptoms such as tingling, weakness, or difficulty speaking. While other factors in the patient’s medical history may also be relevant, migraine with aura is the primary concern when considering contraception options.
The decision to prescribe the combined oral contraceptive pill is now based on the UK Medical Eligibility Criteria (UKMEC), which categorizes potential contraindications and cautions on a four-point scale. UKMEC 1 indicates no restrictions for use, while UKMEC 2 suggests that the benefits outweigh the risks. UKMEC 3 indicates that the disadvantages may outweigh the advantages, and UKMEC 4 represents an unacceptable health risk. Examples of UKMEC 3 conditions include controlled hypertension, a family history of thromboembolic disease in first-degree relatives under 45 years old, and current gallbladder disease. Examples of UKMEC 4 conditions include a history of thromboembolic disease or thrombogenic mutation, breast cancer, and uncontrolled hypertension. Diabetes mellitus diagnosed over 20 years ago is classified as UKMEC 3 or 4 depending on severity. In 2016, Breastfeeding between 6 weeks and 6 months postpartum was changed from UKMEC 3 to UKMEC 2.
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This question is part of the following fields:
- Gynaecology
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Question 7
Incorrect
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A 5-year-old girl is brought to the GP by her mother, who reports that the child has been feeling unwell for the past day. The mother explains that the girl has a fever and has not been eating properly. The child has no significant medical history. Upon examination, the child appears pale and flushed. There is a widespread maculopapular rash on her chest and back, and small white papules are visible on the inside of her cheeks.
What is the most common complication associated with the likely diagnosis?Your Answer: Orchitis
Correct Answer: Otitis media
Explanation:The patient’s symptoms of fever, maculopapular rash, and koplik spots suggest a diagnosis of measles. The most common complication of measles is otitis media, which can cause unilateral ear pain, fever, and redness/swelling of the tympanic membrane. While bronchitis and encephalitis are possible complications of measles, they are less common than otitis media. Meningitis is also a serious complication of measles, but it typically presents with different symptoms such as neck stiffness and a non-blanching rash. Orchitis, which causes scrotal pain, is a complication of mumps rather than measles.
Measles: A Highly Infectious Viral Disease
Measles is a viral disease caused by an RNA paramyxovirus. It is one of the most infectious known viruses and is spread through aerosol transmission. The disease has an incubation period of 10-14 days and is infective from the prodromal phase until four days after the rash starts. Measles is now rare in developed countries due to immunization programs, but outbreaks can occur when vaccination rates drop, such as during the MMR controversy of the early 2000s.
The disease is characterized by a prodromal phase, which includes irritability, conjunctivitis, fever, and Koplik spots. The latter typically develop before the rash and are white spots on the buccal mucosa. The rash starts behind the ears and then spreads to the whole body, becoming a discrete maculopapular rash that may become blotchy and confluent. Desquamation may occur after a week, typically sparing the palms and soles. Diarrhea occurs in around 10% of patients.
Measles is mainly managed through supportive care, and admission may be considered in immunosuppressed or pregnant patients. The disease is notifiable, and public health should be informed. Complications of measles include otitis media, pneumonia (the most common cause of death), encephalitis (typically occurring 1-2 weeks following the onset of the illness), subacute sclerosing panencephalitis (very rare, may present 5-10 years following the illness), febrile convulsions, keratoconjunctivitis, corneal ulceration, diarrhea, increased incidence of appendicitis, and myocarditis.
If an unimmunized child comes into contact with measles, MMR should be offered within 72 hours. Vaccine-induced measles antibody develops more rapidly than that following natural infection.
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This question is part of the following fields:
- Paediatrics
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Question 8
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A 36-year-old man with Crohn's disease is taking azathioprine to keep his condition under control. He visits his doctor complaining of fever, fatigue, and cold-like symptoms that have lasted for three days. Given his medical history, the doctor is worried and decides to run some tests.
What is the most crucial test to perform in this scenario?Your Answer: Full blood count
Explanation:If a patient experiences infection or bleeding while taking azathioprine, it is important to consider a full blood count. This is because azathioprine can cause myelosuppression, which can be life-threatening if left untreated. A chest X-ray would not be helpful in this scenario as it would not show myelosuppression. Liver function tests are also not as important as checking the full blood count. Checking TPMT levels is not necessary in this case as they would have already been checked before starting the medication.
Azathioprine is a medication that is broken down into mercaptopurine, which is an active compound that inhibits the production of purine. To determine if someone is at risk for azathioprine toxicity, a test for thiopurine methyltransferase (TPMT) may be necessary. Adverse effects of this medication include bone marrow depression, which can be detected through a full blood count if there are signs of infection or bleeding, as well as nausea, vomiting, pancreatitis, and an increased risk of non-melanoma skin cancer. It is important to note that there is a significant interaction between azathioprine and allopurinol, so lower doses of azathioprine should be used in conjunction with allopurinol. Despite these potential side effects, azathioprine is generally considered safe to use during pregnancy.
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This question is part of the following fields:
- Musculoskeletal
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Question 9
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A 68-year-old woman undergoes a lumpectomy for a T2 hormone receptor-positive carcinoma in her right breast. The pathology report shows cancerous cells at the margins of the resected specimen. Should the patient receive any additional non-surgical treatment?
Your Answer: Ipsilateral chest wall and regional lymph node radiotherapy
Explanation:Adjuvant ipsilateral chest wall and regional lymph node radiotherapy are recommended for patients with positive axillary lymph nodes and residual tumor at resection margins post-mastectomy, as studies have shown a beneficial effect on overall survival and locoregional recurrence. However, adding letrozole or trastuzumab is not appropriate for this patient with triple-negative carcinoma, as these treatments are used for ER+ and HER2+ cancers, respectively. It is also not necessary to irradiate both breasts/axillae in cases of unilateral breast cancer. No adjuvant treatment is not appropriate in this case, as there is residual disease that needs to be managed. These recommendations are based on the Nice guideline NG101 (2018).
Breast cancer management varies depending on the stage of the cancer, type of tumor, and patient’s medical history. Treatment options may include surgery, radiotherapy, hormone therapy, biological therapy, and chemotherapy. Surgery is typically the first option for most patients, except for elderly patients with metastatic disease who may benefit more from hormonal therapy. Prior to surgery, an axillary ultrasound is recommended for patients without palpable axillary lymphadenopathy, while those with clinically palpable lymphadenopathy require axillary node clearance. The type of surgery offered depends on various factors, such as tumor size, location, and type. Breast reconstruction is also an option for patients who have undergone a mastectomy.
Radiotherapy is recommended after a wide-local excision to reduce the risk of recurrence, while mastectomy patients may receive radiotherapy for T3-T4 tumors or those with four or more positive axillary nodes. Hormonal therapy is offered if tumors are positive for hormone receptors, with tamoxifen being used in pre- and perimenopausal women and aromatase inhibitors like anastrozole in postmenopausal women. Tamoxifen may increase the risk of endometrial cancer, venous thromboembolism, and menopausal symptoms. Biological therapy, such as trastuzumab, is used for HER2-positive tumors but cannot be used in patients with a history of heart disorders. Chemotherapy may be used before or after surgery, depending on the stage of the tumor and the presence of axillary node disease. FEC-D is commonly used in the latter case.
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This question is part of the following fields:
- Surgery
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Question 10
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You are contacted by the nurse in charge of the ward to evaluate a patient who has been recently admitted from her nursing home with pneumonia and confusion. While bathing her, the nurses have observed a pressure sore near her sacrum and have requested for you to examine it. Upon assessment, you discover a 4 cm circular wound lateral to the sacrum with some surrounding redness. It is roughly 1-2 cm deep. The wound bed shows subcutaneous fat with some slough, but no bone, muscle, or tendon is exposed. What grade of pressure sore would be consistent with this?
Your Answer: EPUAP Grade/Stage III
Explanation:Understanding EPUAP Pressure Sore Grades/Stages
Pressure sores, also known as pressure ulcers, are a common problem for individuals who are bedridden or have limited mobility. The European Pressure Ulcer Advisory Panel (EPUAP) has established a grading system to classify pressure sores based on their severity.
Grade I pressure sores are the mildest form and are characterised by non-blanching erythema, which means the skin is red but not broken. Grade II pressure sores are shallow open ulcers with a pink wound bed. Grade III pressure sores involve full thickness tissue loss with exposed subcutaneous fat, but not muscle or tendon. These can be shallow or deep and may include some undermining of the wound edges. Grade IV pressure sores are the most severe and involve exposed bone, muscle, or tendon.
It is important to understand the different grades of pressure sores to properly assess and treat them. Early detection and intervention can prevent the progression of pressure sores and improve the overall health and well-being of individuals at risk.
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This question is part of the following fields:
- Plastics
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