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Pediatrics · Systemic paediatrics: ulcerative colitis extraintestinal disease
Sample itemA 12-year-old has bloody diarrhoea, urgency and tenesmus. Colonoscopy shows continuous friable inflammation from the rectum up to the splenic flexure, and serum p-ANCA is positive. Which extraintestinal complication is characteristically more frequent in this disease than in Crohn disease?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Primary sclerosing cholangitis
Ulcerative colitis is a continuous colonic disease starting at the rectum, often with p-ANCA. Primary sclerosing cholangitis is the characteristic hepatobiliary association. Oxalate stones, gallstones and B12 deficiency belong to ileal Crohn disease.
Option by option
A. Vitamin B12 deficiency from ileal disease
B12 deficiency follows terminal ileal disease or resection, which is typical of Crohn disease.
B. Calcium oxalate renal stones
Oxalate stones follow fat malabsorption from small bowel Crohn disease.
C. Pigment gallstones
Pigment gallstones follow ileal disease and bile salt loss, again typical of Crohn disease.
D. Primary sclerosing cholangitis (correct)
Correct. Primary sclerosing cholangitis is characteristically associated with ulcerative colitis.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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