At our institution, proctocolectomy with rectal mucosectomy and ileoanal anastomosis with endorectal pull-through is now the procedure of choice for young patients with chronic ulcerative colitis and familial polyposis. We have followed up 66 patients (37 male and 29 female, with a median age of 16 years) for at least 6 months after closure of the temporary ileostomy. The patients were seen regularly in follow-up or were sent a comprehensive questionnaire to assess their condition. Twenty-two patients had the construction of a J-pouch, and 44 had a straight ileo-anal pull-through. Stool frequency, day (median 4 to 7 stools) and night (median 1 to 3 stools), was similar in the two groups. Voluntary continence was excellent in both groups during waking hours. Occasional night-time incontinence in small volumes, mild perianal itching, and minimal bleeding from irritation were similar in both groups. Most of the patients could distinguish gas from stool. When medication was used, bulk agents were usually chosen, with a nonspecific antidiarrheal agent taken occasionally. A few patients with the straight ileo-anal pull-through expressed some dissatisfaction early during the follow-up period; however, all but two patients expressed satisfaction later. Of the 66 patients, 41 had at least one complication during the postoperative period; however, in 26 the complications were minor. The more severe complications included small bowel obstruction (11 patients requiring surgical decompression), infection (one patient requiring surgery), and transient neuropathy (three patients).