apple core sign

apple core sign

A radiologic sign having the appearance of the core of a partially eaten apple. When shown during barium enema examination, it is indicative of a focal stricture of the bowel that demonstrates shouldered margins. The most common cause of this sign is an annular carcinoma of the colon.
See: barium enemafor illus.
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The "apple core sign" was first described in barium enema examinations of the colon.