Mushroom sign (pyloric stenosis)

Last revised by Craig Hacking on 23 Apr 2020

The mushroom sign (also called umbrella sign) is a radiological sign described in pyloric stenosis on barium examination.

This sign refers to the impression made by the hypertrophic pylorus on the duodenal cap.

See also

Cases and figures

  • Figure 1: mushroom (photo)
  •  Case 1
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