Frimann-Dahl sign of sigmoid volvulus

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain

Presentation

Abdominal distention and pain.

Patient Data

Age: 50 years
Gender: Male
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Info

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

Case Discussion

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

Case courtersy Professor Saeed Rad, Tabriz, Iran.

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