Frimann-Dahl sign of sigmoid volvulus

Case contributed by Dr Mohammad Taghi Niknejad


Abdominal distention and pain.

Patient Data

Age: 50 years
Gender: Male

Coffee bean appearance with three dense lines converging towards the site of obstruction (Frimann-Dahl sign), which supports the diagnosis of sigmoid volvulus.

Annotated image
  • star = site of obstruction
  • red arrows = converging lines representing sigmoid colon walls

Case Discussion

Frimann-Dahl sign: three linear shadows converging to the site of obstruction - a radiographic sign of sigmoid volvulus.

A case of Professor Saeed Rad, Tabriz, Iran.

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Case information

rID: 20662
Published: 5th Dec 2012
Last edited: 3rd Nov 2020
Inclusion in quiz mode: Included

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