Gastroenterology — MCQs

A 24-year-old male presented with a 4-year history of abdominal pain, periodic diarrhea, low-grade fever, and easy fatigability is found to have an entero-enteric fistula on contrast radiography. Colonoscopy shows "cobblestone" mucosa that has linear ulcerations with "skip areas" of normal bowel wall. Which of the following is the most likely explanation of fistula formation in this patient?

A 40-year-old female presents with koilonychias, iron deficiency, and dysphagia. What is the most likely diagnosis?

Secretory diarrhea is found in which of the following conditions?

Which of the following is a new drug available to treat multidrug-resistant tuberculosis?

Which of the following is an indicator of severe ulcerative colitis?

Which of the following is false regarding involvement in Crohn's disease?

A 40-year-old male patient presented with slowly progressive dysphagia to both solids and liquids, regurgitation, chest pain, and weight loss for 2 months. Investigations included barium swallow, esophageal manometry, and upper GI endoscopy. Which of the following organisms has been most commonly implicated in causing this condition?

A patient presents with pain in the left hypochondrium, vomiting, diarrhea, melena, and weight loss. What is the most likely diagnosis?

A young patient presents with dysphagia, more for liquids than solids, and often regurgitates food at night. Radiography shows a 'rat-tailed' appearance. What is the likely diagnosis?

A 49-year-old man presents with a 10-year history of increasing knee and hip pain, exacerbated by end-of-day activity. Over the past year, he has developed increasing drowsiness at work and his wife reports he is a severe snorer. For the last month, he has experienced episodes of sharp, colicky, right upper abdominal pain. His physical examination reveals a temperature of 37°C, pulse of 82/min, respirations of 10/min, and blood pressure of 140/85 mm Hg. He is 175 cm tall and weighs 156 kg (BMI 51). Laboratory findings include glucose of 139 mg/dL, HbA1c of 10%, total cholesterol of 229 mg/dL, and HDL cholesterol of 33 mg/dL. Arterial blood gas measurements show pH 7.35, PCO2 50 mm Hg, and PO2 75 mm Hg. Which of the following additional conditions is most likely present in this man?