Epiploic Appendagitis :
It is a rare self-limiting ischemic/inflammatory process that affects the appendices epiploicae of the colon. A fat-density ovoid structure adjacent to the colon, usually 1.5-3.5 cm in diameter with thin high-density rim, known as the hyperattenuating ring sign (1-3 mm thick) and surrounding inflammatory fat stranding with thickening of the adjacent peritoneum are noted. It may also have a central hyperdense dot (representing the thrombosed vascular pedicle). Adjacent colonic wall thickening is not usually associated, but if present is usually minimal and the amount of fat inflammation is out of proportion to colonic wall thickening
