Beak sign (pyloric stenosis)

Last revised by Joshua Yap on 2 Mar 2023

Beak sign in pyloric stenosis is one of the fluoroscopic (barium meal) findings that is useful in the diagnosis of congenital hypertrophic pyloric stenosis.

The term bird's beak sign is used in a number of other contexts: see bird beak sign (disambiguation).

A beak-like tapering projection of barium is seen entering into the narrowed and compressed pyloric channel with distal tapering and narrowing of the barium streak.

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