CGRN MCQ 2

Question 1

Which portion of the colon is most commonly affected by ischemic colitis?

Accepted Answer

Splenic flexure (watershed area)

Answer

The splenic flexure is a watershed area between SMA and IMA territories, most vulnerable to ischemia.

Question 2

A patient with cirrhosis develops spontaneous bacterial peritonitis. What is the most common causative agent?

Accepted Answer

Escherichia coli

Answer

E. coli accounts for approximately 40% of SBP cases via bacterial translocation from the gut.

Question 3

Which serum marker is most useful for monitoring ulcerative colitis disease activity?

Accepted Answer

Fecal calprotectin

Answer

Fecal calprotectin directly reflects intestinal inflammation and correlates closely with endoscopic disease activity.

Question 4

What is the initial management for acute esophageal food bolus impaction?

Accepted Answer

IV glucagon trial, then flexible endoscopy if unsuccessful

Answer

Start with IV glucagon 1 mg, then endoscopic removal if the bolus does not pass.

Question 5

A 4 cm smooth submucosal mass is found in the stomach incidentally. What is the most likely diagnosis?

Accepted Answer

Gastrointestinal stromal tumor (GIST)

Answer

GISTs are the most common mesenchymal tumors of the GI tract, 60-70% occurring in the stomach.

CGRN - Certified Gastroenterology Registered Nurse Practice Test