This site is targeted at medical and radiology professionals, contains user contributed content, and material that may be confusing to a lay audience. Use of this site implies acceptance of our Terms of Use.

Sigmoid volvulus

A sigmoid volvulus occurs when the sigmoid colon torses on its mesentery, the sigmoid mesocolon.

Imaging specific signs include the inverted 3 sign which may also be referred to as the coffee bean sign. Another sign is the Frimann Dahl's sign where three dense lines converge towards site of obstruction.  Although now uncommonly performed, a water soluble enema exquisitly demonstrates this condition, with the apperances described as the bird of prey sign.

It is differentiated from a caecal volvulus by its ahaustral wall and the lower end pointing to pelvis.

Updating… Please wait.

 Details successfully updated.

Error Unable to process the form. Check for errors and try again.

 Thank you for updating your details.