Long-term follow-up results of the treatment of high and intermediate anorectal malformations using a modified technique of posterior sagittal anorectoplasty.

The aim of this study was to evaluate the long-term follow-up result of a modified technique in the operation for high and intermediate anorectal malformations. The operation was performed by a posterior sagittal approach with three modifications: The external sphincter complex was not opened on the posterior side, the rectal pouch was not tapered, the dissection was performed outside the rectal pouch. From January 1984 to December 1992, 70 cases were operated on including 55 boys and 15 girls. There was one postoperative death during the first 48 hours due to malignant hyperthermia and one late death due to an unrelated disease. A follow-up result was obtained in 48 of 68 survivors (71 %) with follow-up ranging from 13 months to 10 years 11 months (mean: 72 months). According to the modified Wingspread criteria, 2 patients (4 %) had very good anorectal function, 26 children (54 %) had good anorectal function, 18 children (38 %) had fair anorectal function, and only two children (4 %) had poor anorectal function. All children had urinary continence and all boys had a normal erection. The long-term follow-up result was satisfactory. Two important factors affecting the anorectal function were the type of malformations and the thickness of the external sphincter complex.