IBD IBD Diagnosis and Imaging

Question 1

Which endoscopic finding is considered the gold standard for diagnosing Crohn's disease of the terminal ileum?

Accepted Answer

Cobblestone mucosa with linear ulcers

Answer

Pseudopolyps

Answer

Loss of haustra

Answer

Continuous erythema from rectum

Question 2

What is the preferred imaging modality for evaluating small bowel involvement in Crohn's disease?

Accepted Answer

CT enterography (CTE) or MR enterography (MRE)

Answer

Plain abdominal X-ray

Answer

Barium enema

Answer

Abdominal ultrasound alone

Question 3

Which fecal biomarker is most useful for monitoring intestinal inflammation and mucosal healing in IBD?

Accepted Answer

Fecal calprotectin

Answer

Fecal occult blood (FOBT)

Answer

Fecal lactoferrin

Answer

C-reactive protein (CRP)

Question 4

On colonoscopy, the finding of 'backwash ileitis' can occur in which IBD condition?

Accepted Answer

Extensive ulcerative colitis (pancolitis)

Answer

Crohn's disease limited to ileum

Answer

Microscopic colitis

Answer

Diversion colitis

Question 5

Which serological marker combination pattern is most consistent with ulcerative colitis?

Accepted Answer

pANCA positive, ASCA negative

Answer

ASCA positive, pANCA negative

Answer

Both pANCA and ASCA positive

Answer

Both pANCA and ASCA negative

Question 6

Which radiological sign on plain abdominal X-ray suggests toxic megacolon as a complication of IBD?

Accepted Answer

Transverse colon diameter >6 cm with mucosal edema

Answer

Lead pipe sign

Answer

Thumbprinting

Answer

String sign of Kantor