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Question 1
Incorrect
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A 59-year-old man arrives at the emergency department complaining of severe epigastric pain that is radiating to his right upper quadrant and back. He has vomited three times since the pain started this morning and has never experienced this before. On examination, there is no abdominal distention or visible jaundice. His heart rate is 98/min, respiratory rate 18/min, blood pressure 108/66 mmHg, and temperature 37.9ºC. A new medication has recently been added to his regimen. What is the most probable cause of his presentation?
Your Answer: Hydroxychloroquine
Correct Answer: Mesalazine
Explanation:Mesalazine is a potential cause of drug-induced pancreatitis. This medication is commonly prescribed for Crohn’s disease, rheumatoid arthritis, and other conditions as an immunosuppressant. The patient’s symptoms, including epigastric pain radiating to the back, vomiting, low-grade fever, and lack of jaundice, suggest an acute presentation of pancreatitis induced by mesalazine. Although the exact mechanism is unclear, toxicity has been proposed as a possible explanation for mesalazine-induced pancreatitis. While hydroxychloroquine is used to treat systemic lupus erythematosus and rheumatoid arthritis, it is unlikely to cause pancreatitis and may even reduce the risk of this condition. Lithium, a mood stabilizer used to prevent bipolar disorder, has not been associated with pancreatitis. Similarly, metformin, a first-line medication for type 2 diabetes, has not been linked to pancreatitis.
Acute pancreatitis is a condition that is mainly caused by gallstones and alcohol in the UK. A popular mnemonic to remember the causes is GET SMASHED, which stands for gallstones, ethanol, trauma, steroids, mumps, autoimmune diseases, scorpion venom, hypertriglyceridaemia, hyperchylomicronaemia, hypercalcaemia, hypothermia, ERCP, and certain drugs. CT scans of patients with acute pancreatitis show diffuse parenchymal enlargement with oedema and indistinct margins. It is important to note that pancreatitis is seven times more common in patients taking mesalazine than sulfasalazine.
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This question is part of the following fields:
- Surgery
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Question 2
Incorrect
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A 45-year-old overweight woman presents to the emergency department with severe upper abdominal pain that started suddenly 10 hours ago. The pain is at its worst 15 minutes after onset and radiates to her back. She finds some relief by sitting forward. She has also experienced nausea and vomiting but denies any diarrhea or fever. She has been on the combined oral contraceptive pill for the past 4 years and drinks one glass of wine per day but denies any recreational drug use. On examination, she appears unwell, has a pulse rate of 110/min, and is tender in the epigastric region. She has a history of biliary colic but no significant past medical history or previous surgery. What diagnostic test is most likely to yield a diagnosis?
Your Answer: Abdominal and pelvic ultrasound
Correct Answer: Serum lipase
Explanation:Acute pancreatitis, likely caused by gallstones, can be diagnosed by checking for an elevation of more than 3 times the upper limit of normal in a serum lipase test. While chest and abdominal x-rays are not useful for diagnosing pancreatitis, they can help rule out other potential causes of abdominal pain and detect complications of pancreatitis. Full blood examination, urea and electrolytes, and liver function tests do not directly aid in the diagnosis of pancreatitis but can help assess the severity of the disease or provide clues to its cause. Initial investigations to determine the cause may include an abdominal ultrasound, calcium level, and lipid profile.
Understanding Acute Pancreatitis
Acute pancreatitis is a condition that is commonly caused by alcohol or gallstones. It occurs when the pancreatic enzymes start to digest the pancreatic tissue, leading to necrosis. The main symptom of acute pancreatitis is severe epigastric pain that may radiate through to the back. Vomiting is also common, and examination may reveal epigastric tenderness, ileus, and low-grade fever. In rare cases, periumbilical discolouration (Cullen’s sign) and flank discolouration (Grey-Turner’s sign) may be present.
To diagnose acute pancreatitis, doctors typically measure the levels of serum amylase and lipase in the blood. While amylase is raised in 75% of patients, it does not correlate with disease severity. Lipase, on the other hand, is more sensitive and specific than amylase and has a longer half-life. Imaging tests, such as ultrasound and contrast-enhanced CT, may also be used to assess the aetiology of the condition.
Scoring systems, such as the Ranson score, Glasgow score, and APACHE II, are used to identify cases of severe pancreatitis that may require intensive care management. Factors that indicate severe pancreatitis include age over 55 years, hypocalcaemia, hyperglycaemia, hypoxia, neutrophilia, and elevated LDH and AST. It is important to note that the actual amylase level is not of prognostic value.
In summary, acute pancreatitis is a condition that can cause severe pain and discomfort. It is typically caused by alcohol or gallstones and can be diagnosed through blood tests and imaging. Scoring systems are used to identify cases of severe pancreatitis that require intensive care management.
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This question is part of the following fields:
- Surgery
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Question 3
Correct
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You are caring for a patient who has recently been diagnosed with prostate cancer and is currently considering treatment options. He asks you to explain the complications of surgery to remove the prostate. What is another common complication of radical prostatectomy?
Your Answer: Erectile dysfunction
Explanation:Radical prostatectomy often leads to erectile dysfunction as a complication. Other complications that may arise after the surgery include incontinence, urethral stenosis, and retrograde ejaculation due to alpha-blocker therapy or transurethral resection of the prostate (TURP). However, blood in the sperm, testicular atrophy, and an overactive bladder are not caused by prostatectomy.
Management of Prostate Cancer
Localised prostate cancer (T1/T2) can be managed through various treatment options depending on the patient’s life expectancy and preference. Conservative approaches such as active monitoring and watchful waiting can be considered, as well as radical prostatectomy and radiotherapy (external beam and brachytherapy). On the other hand, localised advanced prostate cancer (T3/T4) may require hormonal therapy, radical prostatectomy, or radiotherapy. However, patients who undergo radiotherapy may develop proctitis and are at a higher risk of bladder, colon, and rectal cancer.
For metastatic prostate cancer, the primary goal is to reduce androgen levels. A combination of approaches is often used, including anti-androgen therapy, synthetic GnRH agonist or antagonists, bicalutamide, cyproterone acetate, abiraterone, and bilateral orchidectomy. GnRH agonists such as Goserelin (Zoladex) may result in lower LH levels longer term by causing overstimulation, which disrupts endogenous hormonal feedback systems. This may cause a rise in testosterone initially for around 2-3 weeks before falling to castration levels. To prevent a rise in testosterone, anti-androgen therapy is often used initially. However, this may result in a tumour flare, which stimulates prostate cancer growth and may cause bone pain, bladder obstruction, and other symptoms. GnRH antagonists such as degarelix are being evaluated to suppress testosterone while avoiding the flare phenomenon. Chemotherapy with docetaxel may also be an option for the treatment of hormone-relapsed metastatic prostate cancer in patients who have no or mild symptoms after androgen deprivation therapy has failed, and before chemotherapy is indicated.
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This question is part of the following fields:
- Surgery
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Question 4
Correct
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After catheterisation for acute urinary retention due to a lower urinary tract infection, what is the maximum acceptable residual urine volume in patients aged 65 years or older?
Your Answer: 50ml
Explanation:For patients under the age of 65, post-void volumes of less than 50 ml are considered normal. For patients over the age of 65, post-void volumes of less than 100 ml are considered normal. Chronic urinary retention is diagnosed when there is more than 500 ml of urine remaining in the bladder after voiding. An acute-on-chronic urinary retention is suggested by a post-catheterization urine volume of more than 800 ml.
Acute urinary retention is a condition where a person suddenly becomes unable to pass urine voluntarily, typically over a period of hours or less. It is a common urological emergency that requires investigation to determine the underlying cause. While it is more common in men, it rarely occurs in women, with an incidence ratio of 13:1. Acute urinary retention is most frequently seen in men over 60 years of age, and the incidence increases with age. It has been estimated that around a third of men in their 80s will develop acute urinary retention over a five-year period.
The most common cause of acute urinary retention in men is benign prostatic hyperplasia, a non-cancerous enlargement of the prostate gland that presses on the urethra, making it difficult for the bladder to empty. Other causes include urethral obstructions, such as strictures, calculi, cystocele, constipation, or masses, as well as certain medications that affect nerve signals to the bladder. In some cases, there may be a neurological cause for the condition. Acute urinary retention can also occur postoperatively and in women postpartum, typically due to a combination of risk factors.
Patients with acute urinary retention typically experience an inability to pass urine, lower abdominal discomfort, and considerable pain or distress. Elderly patients may also present with an acute confusional state. Unlike chronic urinary retention, which is typically painless, acute urinary retention is associated with pain and discomfort. A palpable distended urinary bladder may be detected on abdominal or rectal examination, and lower abdominal tenderness may also be present. All patients should undergo a rectal and neurological examination, and women should also have a pelvic examination.
To confirm the diagnosis of acute urinary retention, a bladder ultrasound should be performed. The bladder volume should be greater than 300 cc to confirm the diagnosis, but if the history and examination are consistent with acute urinary retention, an inconsistent bladder scan does not rule out the condition. Acute urinary retention is managed by decompressing the bladder via catheterisation. Further investigation should be targeted by the likely cause, and patients may require IV fluids to correct any temporary over-diuresis that may occur as a complication.
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This question is part of the following fields:
- Surgery
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Question 5
Correct
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A 27-year-old male patient complains of general malaise and pain in his perineum and scrotum, which started two days ago. He also experiences increased urinary frequency and burning pain while urinating. The patient has no significant medical history. During examination, his heart rate is 75/minute, respiratory rate 16/minute, blood pressure 118/80 mmHg, and temperature 37.6ºC. The prostate is tender and there is boggy enlargement on digital rectal examination. What investigation would be appropriate?
Your Answer: Screen for sexually transmitted infections
Explanation:If a young man presents with symptoms of acute prostatitis, it is important to test for sexually transmitted infections (STIs). This is because while Escherichia coli is the most common cause of acute prostatitis, STIs such as Chlamydia trachomatis and Neisseria gonorrhoeae can also be responsible, especially in younger men. Testing for other conditions such as measuring PSA or testing for HIV would not be appropriate in this case. Biopsy of the prostate is also not indicated for acute prostatitis, but may be useful in chronic cases.
Acute bacterial prostatitis is a condition that occurs when gram-negative bacteria enter the prostate gland through the urethra. The most common pathogen responsible for this condition is Escherichia coli. Risk factors for acute bacterial prostatitis include recent urinary tract infection, urogenital instrumentation, intermittent bladder catheterisation, and recent prostate biopsy. Symptoms of this condition include pain in various areas such as the perineum, penis, rectum, or back, obstructive voiding symptoms, fever, and rigors. A tender and boggy prostate gland can be detected during a digital rectal examination.
The recommended treatment for acute bacterial prostatitis is a 14-day course of a quinolone. It is also advisable to consider screening for sexually transmitted infections.
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This question is part of the following fields:
- Surgery
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Question 6
Incorrect
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A 32-year-old man presents to the emergency department with bright red rectal bleeding. The bleeding started several hours ago after he has been to the toilet to defecate and he states that if he had to guess he has lost around 'a mug's worth' of blood. He is normally fit and well and has no significant past medical history. His observations are BP 115/84 mmHg, heart rate 74/min, temperature 37.3ºC, respiration rate 12/min, and oxygen saturation 98% on room air.
What is the appropriate course of action for managing this patient?Your Answer: Endoscopy
Correct Answer: Supportive management
Explanation:When a patient with acute PR bleeds is haemodynamically stable, the primary treatment approach is supportive management. In this scenario, the patient is likely suffering from haemorrhoids. Supportive management involves providing analgesia for pain relief, regular monitoring of the patient’s condition, and administering fluids and oxygen as necessary.
If the patient shows signs of haemodynamic compromise, intravenous fluids and/or blood transfusions may be necessary. Endoscopy is a useful tool for identifying the underlying cause of the bleed. Colonoscopy is typically used in elective settings, while flexible sigmoidoscopy is effective in identifying haemorrhoids as the source of the bleed.
Understanding Lower Gastrointestinal Bleeding
Lower gastrointestinal bleeding, also known as colonic bleeding, is characterized by the presence of bright red or dark red blood in the rectum. Unlike upper gastrointestinal bleeding, colonic bleeding rarely presents as melaena type stool. This is because blood in the colon has a powerful laxative effect and is rarely retained long enough for transformation to occur. Additionally, the digestive enzymes present in the small bowel are not present in the colon. It is important to note that up to 15% of patients presenting with hematochezia will have an upper gastrointestinal source of haemorrhage.
Right-sided bleeds tend to present with darker coloured blood than left-sided bleeds. Haemorrhoidal bleeding, on the other hand, typically presents as bright red rectal bleeding that occurs post defecation either onto toilet paper or into the toilet pan. However, it is very unusual for haemorrhoids alone to cause any degree of haemodynamic compromise.
There are several causes of lower gastrointestinal bleeding, including colitis, diverticular disease, cancer, and angiodysplasia. The management of lower gastrointestinal bleeding involves prompt correction of any haemodynamic compromise. Unlike upper gastrointestinal bleeding, the first-line management is usually supportive. When haemorrhoidal bleeding is suspected, a proctosigmoidoscopy is reasonable as attempts at full colonoscopy are usually time-consuming and often futile. In the unstable patient, the usual procedure would be an angiogram, while in others who are more stable, a colonoscopy in the elective setting is the standard procedure. Surgery may be necessary in some cases, particularly in patients over 60 years, those with continued bleeding despite endoscopic intervention, and those with recurrent bleeding.
In summary, lower gastrointestinal bleeding is a serious condition that requires prompt attention. It is important to identify the cause of the bleeding and manage it accordingly to prevent further complications.
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This question is part of the following fields:
- Surgery
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Question 7
Incorrect
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A 42-year-old man seeks counselling for a vasectomy. What is a true statement about vasectomy?
Your Answer: Sexual intercourse should be avoided for one month to reduce the chance of a sperm granuloma
Correct Answer: Chronic testicular pain is seen in more than 5% of patients
Explanation:Vasectomy: A Simple and Effective Male Sterilisation Method
Vasectomy is a male sterilisation method that has a failure rate of 1 per 2,000, making it more effective than female sterilisation. The procedure is simple and can be done under local anesthesia, with some cases requiring general anesthesia. After the procedure, patients can go home after a couple of hours. However, it is important to note that vasectomy does not work immediately.
To ensure the success of the procedure, semen analysis needs to be performed twice following a vasectomy before a man can have unprotected sex. This is usually done at 12 weeks after the procedure. While vasectomy is generally safe, there are some complications that may arise, such as bruising, hematoma, infection, sperm granuloma, and chronic testicular pain. This pain affects between 5-30% of men.
In the event that a man wishes to reverse the procedure, the success rate of vasectomy reversal is up to 55% if done within 10 years. However, the success rate drops to approximately 25% after more than 10 years. Overall, vasectomy is a simple and effective method of male sterilisation, but it is important to consider the potential complications and the need for semen analysis before engaging in unprotected sex.
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This question is part of the following fields:
- Surgery
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Question 8
Incorrect
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As a member of the surgical team, you come across a patient who is a 32-year-old male diagnosed with pigmented gallstones. In which condition is this frequently observed?
Your Answer: Pancreatitis
Correct Answer: Sickle cell anaemia
Explanation:Sickle cell disease is linked to the formation of pigmented gallstones.
The increased breakdown of red blood cells in sickle cell disease leads to the development of pigmented gallstones. These types of gallstones are mainly composed of bilirubin and are commonly seen in individuals with hemolytic anemia and liver cirrhosis. Fanconi anemia and myelodysplastic syndrome are both forms of anemia caused by a decrease in hemoglobin production, rather than increased hemolysis. On the other hand, pancreatitis and glomerulonephritis are not associated with the formation of pigmented gallstones.
Biliary colic is a condition that occurs when gallstones pass through the biliary tree. The risk factors for this condition are commonly referred to as the ‘4 F’s’, which include being overweight, female, fertile, and over the age of forty. Other risk factors include diabetes, Crohn’s disease, rapid weight loss, and certain medications. Biliary colic occurs due to an increase in cholesterol, a decrease in bile salts, and biliary stasis. The pain associated with this condition is caused by the gallbladder contracting against a stone lodged in the cystic duct. Symptoms include right upper quadrant abdominal pain, nausea, and vomiting. Diagnosis is typically made through ultrasound. Elective laparoscopic cholecystectomy is the recommended treatment for biliary colic. However, around 15% of patients may have gallstones in the common bile duct at the time of surgery, which can result in obstructive jaundice. Other possible complications of gallstone-related disease include acute cholecystitis, ascending cholangitis, acute pancreatitis, gallstone ileus, and gallbladder cancer.
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This question is part of the following fields:
- Surgery
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Question 9
Incorrect
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A 28-year-old female patient presents to her GP with concerns about a lump in her right breast. The patient reports that she first noticed the lump about two months ago and it has remained persistent without any noticeable increase in size. Upon examination, the GP observes a smooth, mobile 2 cm lump in the Inferolateral quadrant without skin or nipple changes. The patient denies any family history of breast cancer and has no lumps in her axilla. What is the most suitable course of action for management?
Your Answer: Arrange breast ultrasound
Correct Answer: Routine breast clinic referral
Explanation:If a woman under 30 years old presents with an unexplained breast lump with or without pain, she may not meet the 2-week-wait referral criteria but can still be referred for further evaluation. The most likely diagnosis is a fibroadenoma, which is a common benign breast lump that often occurs in younger women. These lumps are typically firm, smooth, and highly mobile. It is important to refer the patient to a breast clinic for evaluation, but routine referral is sufficient given the low likelihood of cancer. Mammograms or ultrasounds are not necessary at this stage. Reviewing the patient in one month is also unnecessary as the lump has already persisted for two months. Urgent referral is not needed due to the patient’s age and low risk of breast cancer. NICE CKS recommends a 2-week-wait referral for those over 30 years old with an unexplained breast lump, or over 50 years old with unilateral nipple changes. Referral should also be considered for those with skin changes suggestive of breast cancer or those over 30 years old with an unexplained lump in the axilla.
In 2015, NICE released guidelines for referring individuals suspected of having breast cancer. If a person is 30 years or older and has an unexplained breast lump with or without pain, or if they are 50 years or older and have discharge, retraction, or other concerning changes in one nipple only, they should be referred using a suspected cancer pathway referral for an appointment within two weeks. If a person has skin changes that suggest breast cancer or is 30 years or older with an unexplained lump in the axilla, a suspected cancer pathway referral should also be considered. For individuals under 30 years old with an unexplained breast lump with or without pain, non-urgent referral should be considered.
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This question is part of the following fields:
- Surgery
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Question 10
Incorrect
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A 25-year-old man comes to his doctor complaining of rectal pain that has been bothering him for the past 4 days. He describes the pain as sharp and shooting, and it gets worse when he has a bowel movement or engages in anal sex. The patient has a history of constipation. During the examination, a small tear is visible on the posterior aspect of the anal margin. The doctor offers the patient appropriate pain relief. What is the best initial course of action?
Your Answer: Topical glyceryl trinitrate
Correct Answer: Bulk-forming laxatives
Explanation:Conservative management should be attempted first for the treatment of fissures, as most cases will resolve with this approach. If conservative management is not effective, lateral partial internal sphincterotomy is the preferred surgical treatment. Loperamide is not recommended as it can worsen the condition by increasing constipation and straining. Topical glyceryl trinitrate is effective in treating chronic anal fissures by relaxing the musculature and expanding blood vessels, but it is not the first-line treatment for acute anal fissures.
Understanding Anal Fissures: Causes, Symptoms, and Treatment
Anal fissures are tears in the lining of the distal anal canal that can be either acute or chronic. Acute fissures last for less than six weeks, while chronic fissures persist for more than six weeks. The most common risk factors for anal fissures include constipation, inflammatory bowel disease, and sexually transmitted infections such as HIV, syphilis, and herpes.
Symptoms of anal fissures include painful, bright red rectal bleeding, with around 90% of fissures occurring on the posterior midline. If fissures are found in other locations, underlying causes such as Crohn’s disease should be considered.
Management of acute anal fissures involves softening stool, dietary advice, bulk-forming laxatives, lubricants, topical anaesthetics, and analgesia. For chronic anal fissures, the same techniques should be continued, and topical glyceryl trinitrate (GTN) is the first-line treatment. If GTN is not effective after eight weeks, surgery (sphincterotomy) or botulinum toxin may be considered, and referral to secondary care is recommended.
In summary, anal fissures can be a painful and uncomfortable condition, but with proper management, they can be effectively treated. It is important to identify and address underlying risk factors to prevent the development of chronic fissures.
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This question is part of the following fields:
- Surgery
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