chapter 11
Mock examination
Questions
1.A 50-year-old man with ileocaecal Crohn’s disease (CD) in long-term remission had been taking azathioprine monotherapy 200 mg once a day for the last seven years.
Which pattern of drug-induced liver injury is this most likely to have caused?
2.A 59-year-old man underwent small bowel resection for mesenteric infarction. He was seen in clinic and complained of persistent thirst. He had 130 cm small bowel to an end jejunostomy with a stoma output of 1,300 ml per day.
What is the best management advice for this patient?
A. Ensure he has long-term parenteral support
B. Increase oral water intake to at least 1,000 ml per day
E. Restrict hypotonic fluid intake to less than 500 ml per day but add no additional fluid
Which radiological finding is an absolute contraindication to surgical resection?
A. Bilateral involvement of the main left and right hepatic ducts
B. Involvement of the common hepatic duct
C. Locoregional lymphadenopathy
D. Tumour abutting hepatic artery
4.A 29-year-old dancer presented with persistent abdominal pain, nausea, and constipation. She denied taking opiates or anticholinergics but did smoke cannabis once per month. On examination, her body mass index (BMI) was 17.4 kg/m2. She was not diabetic but there was a history of dizziness on standing.
Investigations:
Gastroscopy | Normal |
Ileocolonoscopy | Normal |
MR enterography | Normal |
Tilt table test | Consistent with postural orthostatic tachycardia syndrome |
Beighton score | 6/9 suggestive of hypermobility |
What is the most likely cause of her abdominal symptoms?
5.A 34-year-old man presented with symptoms suggestive of delayed gastric emptying.
7.The management of a 60-year-old man with a new diagnosis of head of pancreas adenocarcinoma was discussed by the multi-disciplinary team.
Which of the following CT findings makes the tumour most likely to be unresectable?
A. Tumour contact with aorta without deformity or stenosis
B. Tumour contact with the common hepatic artery
D. Tumour contact with one third of the coeliac axis without deformity or stenosis
8.A 64-year-old man was admitted with melaena. He had a background of angina and had two drug-eluting coronary stents inserted 10 months previously. His medications comprised aspirin, clopidogrel, bisoprolol, ramipril, and atorvastatin. He had recently been using naproxen for lower back pain.
Investigations:
How should you manage his antiplatelet therapy following the endoscopy?
A. Restart aspirin after three days, stop clopidogrel
B. Restart aspirin immediately, essential to discuss with cardiology regarding clopidogrel
C. Restart both aspirin and clopidogrel immediately
D. Restart clopidogrel after three days, stop aspirin
9.A 56-year-old man presented with pruritus ani.
Which of the following statements is true?
A. Candida infections are a cause of less than 5% of cases
B. Capsaicin has good evidence for alleviating the condition through effects on histamine release
C. Most cases are due to a single identifiable cause
D. Pinworm is a common cause of the condition in children
E. The use of soap to clean the perianal area should be encouraged
10.
Regarding gastric acid secretion, which of the following statements is true?
A. Enterochromaffin cells are found in abundance in the gastric antrum
B. Enterochromaffin cells release histamine when stimulated by gastrin or acetylcholine
C. Gastrin is released from G cells in the body
11.A 63-year-old lorry driver was referred with a four-month history of bloody diarrhoea 4–6 times per day. He had mild left-sided abdominal pain. There was no history of fevers or weight loss. He denied recent foreign travel. His past medical history included ischaemic heart disease and hypertension.
Investigations:
Haemoglobin | 129 g/L |
Platelet count | 475 × 109/L |
Serum albumin | 31 g/L |
Serum C-reactive protein (CRP) | 25 mg/L |
Flexible sigmoidoscopy | Confluent colitis to point of insertion (50 cm) consistent with ulcerative colitis (UC) |
With respect to inflammatory bowel disease (IBD) in the elderly, which statement is most accurate?
A. Elderly-onset UC is more common in women
B. Elderly UC patients have a higher risk of being hospitalized, especially with their first flare
C. In elderly CD patients, ileal involvement is more common than colonic involvement
E. Older age is not an independent risk factor for adverse events to medications
With respect to bowel preparation, which statement is most accurate?
A. All bowel preparations are associated with dehydration and electrolyte imbalances
B. Extended bowel preparation is recommended in patients with constipation
C. High-volume polyethylene glycol (PEG) is not safe in the setting of renal impairment
D. Lower adenoma detection rates correlate with inadequate bowel preparation
E. Split-dose low-volume PEG is superior to split-dose low-volume PEG preparations
13.A 45-year-old woman with Child-Pugh C alcohol-related cirrhosis was admitted with a fractured tibia following a fall. She was currently drinking two bottles of wine a day. After 18 hours, she developed severe alcohol withdrawal syndrome (AWS)
Which of the following would be the best treatment option?
14.A 45-year-old man with a history of alcohol excess presented with epigastric pain, vomiting, systemic inflammatory response syndrome, and acute kidney injury.
Investigations:
Serum amylase | 1,200 U/L |
Abdominal ultrasound | Normal |
Five weeks after presentation, a computed tomography (CT) scan was performed because of ongoing abdominal pain and fevers.
CT abdomen | 10 cm encapsulated homogenous fluid collection around the head of the pancreas |
White cell count | 15 × 109/L |
Serum C-reactive protein (CRP) | 145 mg/L |
Serum amylase | 205 U/L |
What is the most likely diagnosis?
A. Acute necrotic collection (ANC)
B. Acute peripancreatic fluid collection
C. Interstitial oedematous pancreatitis (IOP)
Investigations:
Serum bilirubin | 10 µmol/L |
Serum alanine transferase (ALT) | 87 U/L |
Serum alkaline phosphatase (ALP) | 100 U/L |
Serum albumin | 42 g/L |
Serum ferritin | 545 µg/L |
Anti-smooth muscle antibody | positive |
Liver histology | (Fig. 11.1) |
Image courtesy of Dr Eve Fryer, OUH NHS Foundation Trust, Oxford
What is the most likely diagnosis?
Investigations:
What would be the next best management for his pain?
17.A 20-year-old man presented to the gastroenterology outpatient clinic. He was an only child whose father was diagnosed with hereditary non-polyposis CRC at the age of 40 years and died of CRC. No other family history was available. The patient was asymptomatic.
What is the next most appropriate step in his management?
A. Colonoscopy and gastroscopy
B. Colonoscopy from age 25 years
D. Five-yearly colonoscopy from age 50 to 75 years
18.
B. IBD is detected at colonoscopy in 50% of patients with PSC
C. Mesalazine is considered an ineffective first-line therapy in PSC/UC
D. PSC is associated with an increased incidence of small bowel CD
E. Screening for CRC should begin 8–10 years after PSC/IBD diagnosis.
Investigations:
Faecal microscopy and culture | Negative |
Faecal polymerase chain reaction (PCR) | Positive for Giardia lamblia |
Which statement best describes the Giardia lamblia trophozoite cycle?
A. Trophozoite colonization is limited to the upper small bowel
C. Trophozoites invade tissues and gain entry to the lymphatic system, facilitating systemic spread
20.A 42-year-old presented with non-specific abdominal discomfort and proceeded to endoscopy.
Investigations:
Gastroscopy | There was a 1 cm, pale yellow, sessile polypoid lesion located at 36 cm from the incisors. The lesion was firm but passable with the endoscope and appeared submucosal. The appearances of the upper GI tract were otherwise normal |
Endoscopic ultrasound (EUS) | At 36 cm there is a smooth-edged, hypoechoic, homogenous appearing lesion arising from the submucosa |
Histology of polyp | Polygonal cells with granular eosinophilic cytoplasm |
What is the most likely diagnosis?
Investigations:
Flexible sigmoidoscopy | Continuous inflammation to 35 cm with deep ulceration, complete obliteration of vascular pattern and free liquid blood in the lumen |
What is the Ulcerative Colitis Endoscopic Index of Severity (UCEIS) score?
22.An 87-year-old man with progressive dysphagia was referred urgently for endoscopy. The endoscope was introduced into the oesophagus with some difficulty, and the view shown in (Fig. 11.2) was seen at 31 cm.
Which of the following is most appropriate?
23. 0Variants in which gene are the most common cause of hereditary pancreatitis?
24.A 45-year-old man was diagnosed with ulcerative pancolitis and concurrent PSC one year ago. He returned for his first annual follow-up appointment. He was asymptomatic.
Investigations:
Serum bilirubin | 15 µmol/L |
Serum alkaline phosphatase (ALP) | 125 U/L |
Serum alanine aminotransferase (ALT) | 25 U/L |
Serum albumin | 37 g/L |
Serum CA 19-9 | 20 U/ml |
Colonoscopy | Quiescent UC |
Abdominal ultrasound | 8 mm polyp posterior wall of the gallbladder |
What is the best next step in this patient’s management?
25.A 36-year-old ex-offender was referred to the gastroenterology clinic with nausea, vomiting, abdominal pain, and early satiety. He reported 6 kg unintentional weight loss recently. He gave a history of previous substance misuse.
Which recreational drug is associated with delayed gastric emptying?
Investigations:
Serum bilirubin | 16 µmol/L |
Serum alkaline phosphatase (ALP) | 195 U/L |
Serum alanine transferase (ALT) | 285 U/L |
Serum albumin | 39 g/L |
Full blood count | Normal |
INR | 1.0 |
Antinuclear antibody | Positive |
Antinuclear cytoplasmic antibody | Positive |
Anti-mitochondrial antibody | Negative |
Anti-smooth muscle antibody | Negative |
IgA | 1.8 g/L |
IgG | 19 g/L |
IgM | 1.5 g/L |
What investigation would you order next?
27.A 46-year-old female with a history of CD attended clinic. She underwent an ileocaecal resection four years ago and was on no maintenance therapy. She continued to smoke 15 cigarettes/day. She underwent a colonoscopy for symptoms of loose stool.
Investigation:
Colonoscopy | Insertion to neo-terminal ileum. Ileocolic anastomosis patent. Colon normal. Diffuse aphthous ileitis with diffusely inflamed mucosa. No evidence of stenosis or large ulcers. |
Investigations:
Haemoglobin | 130 g/L |
White cell count | 7.0 × 109/L |
Platelet count | 180 × 109/L |
Eosinophil count | 0.6 × 109/L |
Serum C-reactive protein (CRP) | 30 mg/L |
Serum alanine transferase (ALT) | 34 U/L |
Serum alkaline phosphatase (ALP) | 110 U/L |
Serum bilirubin | 10 µmol/L |
Faecal microscopy and culture | Negative including ova, cysts, and parasites |
Chest radiograph | Ill-defined nodular pulmonary infiltrates |
Which is the next most appropriate diagnostic test?
29.A 65-year-old woman with alcohol-related cirrhosis is seen with her husband in the hepatology clinic. She has been abstinent from alcohol for two years. Her husband is concerned that she is not her usual self. She appears oriented to time and place.
Which of the following is correct in the diagnosis of hepatic encephalopathy (HE)?
A. A rise in blood ammonia level is diagnostic of HE
B. Brain imaging is essential for diagnosis
C. Electroencephalography (EEG) examination is only useful in grade IV HE
D. The Stroop test can be used to help make a diagnosis of HE
Investigation:
Thiopurine methyltransferase | 16 U/L |
Which of the following statements about thiopurine methyltransferase (TPMT) levels is most accurate?
A. Normal TPMT levels predict clinical response to thiopurines
B. TPMT activity is absent in 1% of the population
C. TPMT activity is normal in 50% of the population
D. TPMT levels accurately predict the risk of leucopenia
E. Variants in TPMT account for up to 25% of thiopurine-induced leucopenia
31. A 65-year-old man with Child-Pugh C (10) alcohol-related cirrhosis presents with Grade 3 ascites. Routine blood tests and a diagnostic paracentesis are performed.
Investigations:
Serum bilirubin | 58 µmol/L |
Serum creatinine | 105 µmol/L |
Serum sodium | 129 mmol/L |
Ascites white cell count | 410 cells/µL |
Ascites neutrophil count | 220 cells/µL |
Ascites albumin | 5 g/L |
Ascites total protein | 9 g/L |
The patient has been referred for consideration of liver transplantation (LT) or transjugular intrahepatic portosystemic shunt (TIPSS) and in the interim repeated large volume paracentesis is performed.
Which of the above would be an indication for long-term antibiotic prophylaxis?
Investigations:
Gastroscopy | 4 cm antral tumour |
Histology | Adenocarcinoma |
33.A 28-year-old Iranian farmer, who had recently immigrated to the UK, was referred to clinic with persistent diarrhoea. He also complained of hair loss, taste disturbance, and a superficial scaling erythematous patchy rash that was most prominent in intertriginous areas and periorally. There was no cognitive impairment.
Which is the most likely nutrient deficiency?
Investigations:
Haemoglobin | 122 g/L |
White cell count | 4.6 × 109/L |
Mean corpuscular volume | 76 fL |
Platelet count | 209 × 109/L |
Serum ferritin | 6 µg/L |
Serum folate | 2.6 µg/L |
Serum vitamin B12 | 178 ng/L |
Serum C-reactive protein (CRP) | 16 mg/L |
The endoscopic images demonstrated the findings shown in (Fig. 11.3).
Which of the following is the most appropriate next step?
Investigations:
Gallbladder histology | Chronic cholecystitis with no gallstones |
MRCP | Common bile duct (CBD) diameter 4.9 mm, main pancreatic duct diameter 1.2 mm, no features of chronic pancreatitis |
EUS | CBD 4.5 mm, no evidence of biliary microlithiasis or sludge |
What is the next most appropriate management strategy?
A. Endoscopic intra-sphincteric botulinum toxin injection
B. ERCP with biliary sphincterotomy
D. ERCP with pancreatic sphincterotomy
36.A 56-year-old woman presented with progressive dysphagia to solids but not liquids. She took omeprazole 20 mg twice daily for heartburn.
Investigations:
Gastroscopy | Impassable stricture at 34 cm which appeared endoscopically benign |
Which of the following is true with regards to dilatation of benign-appearing peptic strictures?
A. Balloon dilatation is more effective than wire-guided bougie dilatation
B. Barium swallow must be performed for all oesophageal strictures
C. Biopsies should be taken before proceeding to dilatation
D. Oesophageal perforation occurs in 4% of procedures
E. The use of post-dilatation H2 receptor antagonists reduces rates of stricture recurrence
Investigation:
Barium swallow | (Fig. 11.4) |
Image courtesy of Dr Horace D’Costa, Consultant Radiologist, Oxford University Hospitals NHS Foundation Trust
Given the diagnosis, which of the following would provide definitive management?
A. Cognitive behavioural therapy
B. Cricopharyngeal myotomy and pouch excision
C. Endoscopic balloon dilatation
D. Endoscopic diverticulectomy
Investigations:
Haemoglobin | 104 g/L |
White cell count | 13.1 × 109/L |
Platelet count | 430 × 109/L |
Serum C-reactive protein (CRP) | 112 mg/L |
CT abdomen and pelvis | 12-cm length of terminal ileal stricturing with an adjacent intra-abdominal collection. There are proximal loops of dilated small bowel. Three closely spaced mid-ileal strictures, each about 3 cm, are demonstrated proximal to the dilated loops. Appearances are compatible with active CD. |
What is the most likely surgical procedure?
A. Defunctioning loop ileostomy proximal to the mid-ileal strictures
B. Defunctioning loop ileostomy proximal to the terminal ileal stricture
D. Ileocaecal resection and en bloc mid-ileal stricture resection
E. Ileocaecal resection and three mid-ileal stricturoplasties
Investigations:
Rheumatoid factor | Negative |
IgA tissue transglutaminase antibody | Negative |
Thyroid stimulating hormone (TSH) | Normal |
Faecal microscopy and culture | Negative |
Faecal ova, cysts, and parasites | Negative |
HIV | Negative |
Gastroscopy | Normal |
Duodenal histology | Mild duodenal villous blunting |
Colonoscopy | Normal |
Colonic histology | Normal |
MR enterography | No evidence of small bowel inflammation |
Investigations:
Platelet count | 170 × 109/L |
Liver stiffness measurement (LSM) | 10.8 kPa |
Serum alkaline phosphatase (ALP) | 180 U/L |
Serum bilirubin | 45 µmol/L |
Liver ultrasound | Coarse irregular heterogenous liver, no focal lesion, normal portal vein flow, no ascites, spleen size 12 cm |
Which of the following is true about PBC?
A. Fatigue is an indication for LT
B. Recurrent PBC following LT often leads to graft loss
C. Severity of symptoms does not correlate with stage of disease
D. This patient should undergo endoscopy for variceal screening
E. Women are at increased risk of hepatocellular carcinoma compared with men
41.A 40-year-old woman was reviewed on the ward 24 hours after LT for alcohol-related cirrhosis. The organ donor was positive and the recipient was negative for cytomegalovirus (CMV) (D+/R−).
What is the most appropriate management regarding CMV infection post-transplantation?
A. Foscarnet prophylaxis for three months
B. Intravenous ganciclovir for two weeks
D. Valganciclovir prophylaxis for three months
E. Weekly CMV PCR during hospitalization and start valganciclovir if persisting viraemia
Which of the following objects may be safely considered for conservative management?
43.A 34-year-old man with complex ileocolonic CD developed a secondary loss of response to infliximab. He had evidence of active disease at recent ileocolonoscopy. His background included psoriasis for which he was under the dermatologists.
Which novel therapy is most appropriate to introduce?