Operations were carried out on 40 male and female patients with stage III incontinence of feces from 1970 and through 1980. Their ages ranged from 8 to 14 years. The disease was caused by unsuccessful correction of anorectal developmental anomalies. The following operations were performed: after Wreden on 16 patient, after Faerman on 12, after Makhov on 8 and after Thiersch on 4 patients. The follow-up periods ranged from 2 to 6 years. A recurrence was found in all of the children. Y-shaped sphincteroplasty and a modified Wreden's operation with the use of heterogeneous material have been developed and introduced into practice in the clinic since 1983. Twenty two patients with stage III incontinence of feces were operated on, the result was positive in the majority of cases.