Can we expect a favorable outcome after surgical treatment for an anorectal malformation?

BACKGROUND

The aim of this study was to retrospectively review the classification, surgical experience, and the functional outcome of anorectal malformations (ARMs) according the type of ARM.

METHODS

A total of 311 children (M:F=200:111) who underwent surgical treatment for ARM between 1990 and 2011 were reviewed. Functional outcomes were evaluated using the Krickenbeck classification. The mean follow-up period was 112.2 ± 76.7months (range: 36.8-414.9months).

RESULTS

In the male patients, 90 (45%) had perineal fistulas, 60 (30%) had urethral fistulas, and 7 (3.5%) had rectovesical fistulas. There were 17 cases of ARM without a fistula (8.5%), and we could not determine the type of fistula in 26 boys (13%) because of follow-up losses and death. In the female patients, 34 (30.6%) had perineal fistulas, 71 (64%) had rectovestibular fistulas, and 2 (1.8%) had rectovaginal fistulas. Four patients did not have a fistula (3.6%). For 264 patients, we did anoplasty (121 cases), fistula transposition (14 cases), and posterior sagittal anorectoplasty (PSARP, 129 cases). We found that 224 (84.8%) patients showed voluntary bowel movements. The overall rate for constipation was 30.7% and for soiling was 6.5%. The continence outcome was good for 82.2% of children, fair for 2.7%, and poor for 15.2%. For rectovestibular fistulas, constipation was higher in the perineal operation group, but the continence outcome was similar.

CONCLUSION

Through a review of 20years' experience, an accurate diagnosis based on the Krickenbeck classification and operations following the principles of PSARP are crucial to achieve a good functional outcome in children with an ARM.