We report a case of acquired small bowel volvulus as a cause of late o
bstruction after ileal J-pouch anal anastomosis. Computed tomography (
CT) demonstrated signs of strangulated, adhesive obstruction with radi
al disposition of the loops around the mesenteric root and abnormal po
sition of the superior mesenteric artery and vein on the right side of
the aorta. These features were due to the surgical manipulation and t
ension of the mesentery and its vessels during ileoanal anastomosis.