Sigmoid volvulus; typical "swirling" mesentery and calibre change (see coronal images). Maximal dilatation 12 cm, with approimately 100 cm of involved colon. No pneumatosis or perforation. No obstructing mass or extraluminal lesion.
The proximal colon and small bowel are not obstructed. Local inflammatory changes around the colon on the mesenteric border and along the mesentery. Small volume free fluid in both paracolic gutters and the pelvis, but no collection or significant nodal enlargement.
Left lower renal calculus and simple cortical cyst. Otherwise normal kidneys, liver, biliary system, spleen and adrenal.
Lung bases clear.
Normal included skeleton.