We report 62 operations for acute colonic inflammatory bowel disease in which the rectal stump was closed. Operative findings were of severe colitis in 46, toxic megacolon in 8 and faecal peritonitis in 8 patients. Histology showed ulcerative colitis in 48, Crohn's disease in 9 and indeterminate colitis in 5 patients. Clinical evidence of stump leakage occurred in only one of 53 patients with a long rectal stump in contrast to 3 of 9 patients who had a short rectal stump. Leaving a very short stump also led to difficulty at subsequent proctectomy in 3 patients and at restorative proctocolectomy in 1 patient. This suggests that careful closure of the rectum above the peritoneal reflection can be a safe means of dealing with the rectal stump after total colectomy and ileostomy for acute colitis.