Short segment of abnormal circumferentially thickened colon at the junction of the descending colon into proximal sigmoid with regional diverticular the and extensive surrounding fat stranding with associated thickening of the adjacent parietal pleura. No adjacent collection or free gas identified. Small volume pelvic free fluid. No ureteric or pelvicalyceal calculi bilaterally. No hydronephrosis. Normal appendix. No abnormal small bowel dilatation.