GI Diagnostics & Treatment 3

Question 1

What is the recommended colonoscopy surveillance interval for a patient found to have 3 tubular adenomas (each <10 mm) on screening colonoscopy?

Accepted Answer

3 years

Answer

Per current guidelines, 3-4 small (<10 mm) tubular adenomas without high-grade dysplasia warrant repeat colonoscopy in 3 years.

Question 2

A patient with chronic hepatitis C genotype 1 is being treated with direct-acting antivirals. What defines a sustained virologic response (SVR)?

Accepted Answer

Undetectable HCV RNA 12 weeks after completing treatment

Answer

SVR12 (undetectable HCV RNA 12 weeks post-treatment) is considered a functional cure and is associated with dramatically reduced risk of cirrhosis and HCC.

Question 3

Which of the following endoscopic findings is most consistent with Barrett's esophagus?

Accepted Answer

Salmon-colored tongues of mucosa extending proximal to the GEJ

Answer

Barrett's esophagus appears as salmon-colored (reddish) columnar epithelium extending proximally from the gastroesophageal junction, confirmed by biopsy showing intestinal metaplasia.

Question 4

A 70-year-old patient on warfarin presents with hematemesis and hemodynamic instability. After resuscitation, what is the most appropriate next step?

Accepted Answer

Emergent upper endoscopy

Answer

Emergent upper endoscopy within 24 hours (or sooner if hemodynamically unstable after resuscitation) is both diagnostic and therapeutic for upper GI bleeding.

Question 5

What is the primary mechanism by which rifaximin helps in the management of irritable bowel syndrome with diarrhea (IBS-D)?

Accepted Answer

Suppresses intestinal microbiota, reducing gas production and bloating

Answer

Rifaximin, a non-absorbable antibiotic, modulates the gut microbiome, reducing gas-producing bacteria and improving bloating and diarrhea in IBS-D.

(GI) Gastrointestinal Practice Test

(GI) Gastrointestinal Practice Test

GI Diagnostics & Treatment 3