<prompt> True about colonic volvulusMost common in caecumCommon in psychiatric pt.Birds beak signMay present as intestinal obstruction  <response>: A volvulus is a twisting or axial rotation of a poion of bowel about its mesentery. When complete it forms a closed loop of obstruction with resultant ischaemia secondary to vascular occlusion. Volvuli may be primary or secondary.it is Common in psychiatric patients.The commonest spontaneous type in adults is sigmoid Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1191,1192 