100 Questions with ANSWERs and Detailed Rationales
SECTION 1: GASTROINTESTINAL DISORDERS
Question 1
A 29-year-old woman presents with 6 months of crampy abdominal pain relieved by defecation,
intermittent diarrhea, and bloating. She denies weight loss, fever, or rectal bleeding. Physical exam is
normal. What is the MOST appropriate next step?
A) Immediately schedule colonoscopy with random biopsies
B) Order stool studies including fecal fat, weight, laxative screen, and tests for microorganisms
C) Begin empiric treatment for ulcerative colitis
D) Refer urgently for abdominal CT with contrast
ANSWER: B) Order stool studies including fecal fat, weight, laxative screen, and tests for microorganisms
Rationale: In IBS-like presentations with diarrhea as the dominant symptom, thyroid testing and stool
studies for fecal fat, stool weight, laxative content, microorganisms, and celiac serology should be
performed to exclude organic causes before confirming IBS .
Question 2
A 48-year-old man reports burning chest pain after large meals that worsens when lying down and
improves with antacids. He denies dysphagia, weight loss, or GI bleeding. What is the MOST likely
diagnosis?
A) Acute cholecystitis
B) Gastroesophageal reflux disease (GERD)
C) Peptic ulcer disease
,D) Acute pancreatitis
ANSWER: B) Gastroesophageal reflux disease (GERD)
Rationale: Classic GERD presents with heartburn (pyrosis) ranging from mild to severe, often associated
with meals and positional changes, and relieved by antacids .
Question 3
A 41-year-old female presents with right upper quadrant pain that worsens with deep breathing. She
exhibits a positive Murphy sign. These findings are most consistent with which diagnosis?
A) Appendicitis
B) Cholecystitis
C) Crohn's flare
D) Pancreatitis
ANSWER: B) Cholecystitis
Rationale: Right upper quadrant pain with a positive Murphy sign (arrest of inspiration during deep
palpation of the RUQ) is classic for acute cholecystitis. The pain may radiate to the right shoulder or back
.
Question 4
A 62-year-old woman has chronic watery diarrhea, weight loss, and abdominal cramping. Which finding
would MOST strongly argue against IBS and prompt evaluation for IBD or malignancy?
A) Symptoms that improve after defecation
B) Symptoms worsened by stress
C) Nocturnal diarrhea and rectal bleeding
D) Normal abdominal exam
,ANSWER: C) Nocturnal diarrhea and rectal bleeding
Rationale: Alarm features such as rectal bleeding, weight loss, and nocturnal symptoms raise concern for
IBD or malignancy rather than functional IBS and warrant further evaluation .
Question 5
A 55-year-old man with longstanding GERD reports new-onset dysphagia for solids. He has been taking
only OTC antacids. What is the MOST appropriate initial management?
A) Start a proton pump inhibitor (PPI) trial
B) Start sucralfate only
C) Start chronic high-dose antacids without PPI
D) Refer immediately for surgery
ANSWER: A) Start a proton pump inhibitor (PPI) trial
Rationale: GERD management emphasizes lifestyle modifications combined with acid suppression (PPIs
or H2 blockers). Dysphagia with GERD warrants both empiric PPI therapy and further evaluation .
Question 6
A 21-year-old woman presents with sudden periumbilical pain that migrated to the right lower quadrant
over 24 hours, with low-grade fever and anorexia. RLQ tenderness with guarding is present. What is the
MOST likely diagnosis?
A) Diverticulitis
B) Crohn's disease flare
C) Appendicitis
D) Irritable bowel syndrome
, ANSWER: C) Appendicitis
Rationale: Classic appendicitis manifests as initially vague periumbilical pain that localizes to the RLQ
with tenderness, fever, and anorexia .
Question 7
A 40-year-old man has burning epigastric pain relieved by food and antacids. He takes NSAIDs daily. You
suspect peptic ulcer disease. Which H. pylori test is BEST for initial noninvasive diagnosis in this
outpatient setting?
A) Serum H. pylori IgG antibody
B) Urea breath test
C) Endoscopic biopsy with culture
D) Stool occult blood testing
ANSWER: B) Urea breath test
Rationale: Noninvasive tests such as urea breath testing are preferred for detecting active H. pylori
infection, whereas serology may reflect past exposure and is less useful for current infection .
Question 8
In educating your patient about non-pharmacologic management of GERD, you include that heartburn is
aggravated by all of the following EXCEPT:
A) Activities including lifting or bending over
B) Alcohol intake
C) Foods such as citrus, onions, and coffee
D) Gastric dumping (increased emptying into the small intestines)
ANSWER: D) Gastric dumping, or increased emptying into the small intestines