Epiploic appendages are small outpouchings of fat-filled structures that are present on the external surface of the colon. The appendages are situated along the entire colon, but are typically more abundant and larger in the transverse and sigmoid colon areas. The appendages vary considerably in size, shape, and contour and can be mistaken for diverticular pouches in some cases. The appendages are presumed to serve a protective and defensive mechanism in the abdominal cavity.
Each appendage encloses small branches of an artery and vein that supply the corresponding segment of the colon.
Evidently, epiploic appendagitis is caused by twisting of the appendage and it can become inflammed. According to the literature, the condition should be self-limiting or there can be chronic inflammation with 'supposedly' no symptoms. In the acute phases, however, pain is present.