collar button lesion

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GI disease Any of a number of small deep ulcers with narrow necks, which parallel a barium-filled large intestinal lumen, affected by ulcerative colitis; the 'button' surface corresponds to an eroded ulcer base, and the 'button neck' corresponds to the sides of the islands of preserved mucosa; a similar phenomenon occurs in colonic amebiasis ulcers. See Flask lesion.

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collagenous nevus
collapse
collapse of the lung
collapse therapy
collapsing pulse
collar
collar button abscess
collar button lesion
collar-button abscess
collarbone
collared brown snake
collared peccary
collarette
collateral
collateral artery

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