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Data for 500 patients with Crohn's disease who underwent operations were analyzed (316 patients, 1966 to 1969; 184 patients, 1972 to 1973) by comparison of various anatomic disease locations (clinical pattern): (1) ileocolic, 225 patients; (2) small intestinal, 130 patients; (3) colonic, 127 patients; (4) anorectal, 18 patients. Indications for surgery were tabulated and compared using statistical analysis for the three large patterns. For patients with ileocolic Crohn's disease, the primary surgical indications were internal fistula and abscess, 44%, intestinal obstruction, 35%, and perianal disease, 12%. For patients with Crohn's disease of the small intestine, the primary surgical indications were intestinal obstruction, 55%, and intestinal fistula and abscess, 32%. Patients with colonic Crohn's disease had a significantly more diverse surgical indication, with poor response to medical therapy, 26%, internal fistula and abscess, 23%, toxic megacolon, 20%, and perianal disease, 19%. These values were highly statistically significant (P less than 0.0001) in all instances but one. This study demonstrates that statistically significant differences occur in the surgical indication depending on the location of Crohn's disease. Patients with ileocolic, small intestinal, and colonic involvement have striking differences in clinical course. It is concluded that Crohn's disease is not a homogeneous entity, but should be recognized as having a varying course depending on clinical pattern.

Nine cases of duodenal fistula complicating Crohn's disease are reported. All nine patients were male. Four patients had Crohn's disease of the ileum and five had ileocolitis. No patient had primary duodenal Crohn's disease. Because attempt at primary closure of the duodenal defect may fail, our treatment of choice has been formal cross cut two-layered duodenojejunal anastomostis with extensive drainage of the area postoperatively. This treatment has been associated with no mortality and little morbidity, and no late recurrence of duodenal fistula.

Between 1965 and 1975, 27 patients underwent surgical treatment for ileosigmoidal fistulas complicating Crohn's disease at the Cleveland Clinic. There was no death and no anastomotic leak. The preferred procedure is resection of the ileocecal area involved by Crohn's disease with ileocolic anastomosis and a separate segmental resection of the sigmoid colon with colocolic anastomosis. A covering temporary loop ileostomy is used when there is associated pelvic sepsis or small-bowel obstruction.

The unhealed perineal wound following proctectomy for Crohn disease is a most unfortunate and disabling complication; treatment has been generally unsuccessful and disappointing. Since 1967, we have managed these wounds by skin-grafting the raw surface of the saucerized wound, rather than by attempting to obliterate the cavity. The graft is applied to the defect two or three days after wide debridement and saucerization. No attempt is made to cover more than the readily accessible raw surface. The graft is first dressed on the third postoperative day, and daily thereafter. The patient receives 40 units of corticotropin (ACTH) daily during his hospital stay; the drug therapy is continued in smaller dosage for several months. Results to date have been satisfactory, with seven wounds totally dry, and 37 resurfaced sufficiently so as to make the amount of drainage negligible. Four patients had results classified as poor.