Bowler hat sign is seen in
Correct Answer: Sessile colonic polyp
Description: BOWLER HAT SIGN: Cup shaped filled defect seen on air contrast barium enema that represents POLYP if it points towards lumen. The "bowler-hat sign" represents the appearance of a sessile colonic polyp observed at an oblique angle on a double contrast barium enema. The bowler-hat sign is formed by a ring of barium adjacent to the base of the polyp surrounding a domed layer of barium coating the surface of the polyp.
Category:
Radiology
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