<prompt> Emergency operation done in cases ofVolvulusObstructed herniaAppendicular perforation with paralytic ileusToxic megacolon  <response>: Surgery is required to prevent or relieve ischaemia.When a removable lesion is found in the caecum, ascending colon, hepatic flexure or proximal transverse colon, an emergency right hemicolectomy should be performed. Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1191,1200 