Presentation
Abdominal distention and pain.
Patient Data
Age: 50 years
Gender: Male
From the case:
Frimann-Dahl sign of sigmoid volvulus
Download
Info

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