Acute epiploic appendagitis in hernia sac: CT appearance.

We describe an unusual cause of acute abdomen due to acute epiploicappendagitis located within an incisional hernia sac. The contrast-enhanced CT showed an oval fat density structure with surrounding inflammation in the transverse mesocolon. The contrast-enhanced CT findings of the inflammation of appendices epiploicae of the transverse colon were diagnostic in this case.