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General Surgery · Hepatobiliary and pancreatic surgery: adenomyomatosis of the gallbladder
Sample itemUltrasound of a 50-year-old woman with vague dyspepsia shows focal thickening of the gallbladder fundal wall with small intramural cystic spaces and bright comet-tail echoes. There are no stones and the wall mucosa is regular. What is the most likely diagnosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Adenomyomatosis
Adenomyomatosis is a benign hyperplastic condition in which epithelium herniates into a thickened muscle layer, forming Rokitansky-Aschoff sinuses that trap cholesterol crystals and give comet-tail artefacts. It needs no treatment unless symptomatic.
Option by option
A. Xanthogranulomatous cholecystitis
Xanthogranulomatous disease causes marked inflammatory thickening with hypoechoic nodules and usually stones.
B. Adenomyomatosis (correct)
Correct. Wall thickening with intramural sinuses and comet-tail artefacts is characteristic.
C. Gallbladder carcinoma
Carcinoma would show an irregular mass or invasion of the liver.
D. Cholesterolosis
Cholesterolosis shows lipid-laden macrophages in the mucosa and typically causes no wall thickening.
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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