Epiploic appendagitis - sigmoid colon

Case contributed by Ammar Haouimi
Diagnosis almost certain


Right lower abdominal pain.

Patient Data

Age: 25 years
Gender: Female

There is a small ovoid structure of fat-density in the right iliac fossa,  adjacent to the sigmoid colon with thin peripheral hyperdense rim (hyperattenuating ring sign), surrounding inflammatory fat stranding with thickening of the adjacent peritoneum and minimal peritoneal effusion. A central hyperdense dot is noted, representing the thrombosed vascular pedicle.

Normal appearance of the appendix, uterus and ovaries. 

Annotated image

Annotated images showing the epiploic appendagitis, sigmoid colon, and normal appendix.

Case Discussion

CT features of an epiploic appendagitis of the sigmoid colon.

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