Bird beak sign (sigmoid colon)
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At the time the article was created Mohammed Al Khader.O.Thabet had no recorded disclosures.View Mohammed Al Khader.O.Thabet's current disclosures
At the time the article was last revised Mohamed Saber had no recorded disclosures.View Mohamed Saber's current disclosures
Bird's beak sign of the sigmoid is one of the signs of sigmoid volvulus. It represents gradual narrowing/tapering of the sigmoid colon up to the level of obstruction during contrast/barium insertion to the rectum or on CT.
When located in the sigmoid colon, it suggests the diagnosis of sigmoid volvulus. If the obstruction is complete, no contrast will pass beyond the level of the obstruction but if the obstruction is incomplete some contrast can pass into the proximal twisted sigmoid colon.
The term bird's beak sign is used in a number of other contexts: see bird beak sign (disambiguation).