The Patients with Hirschsprung's Disease Who Underwent Pull-Through at Age Less than 1 Year: Longitudinal Bowel Function.

Background: Frequent stooling immediately after pull-through (PT), fecal soiling, and constipation are chronic complications of Hirschsprung's disease (HD). This study aimed to investigate the longitudinal outcomes in terms of bowel function of patients below the age of 1 year undergoing PT.

Methods: We retrospectively evaluated 396 patients who underwent PT for HD between September 1979 and March 2014. Stool frequency was analyzed up to 10 years of age, and soiling and constipation were analyzed up to 15 years of age.

Results: After resection of the aganglionic segment (AS), stool frequency decreased over time. Furthermore, stool frequency among the three groups was similar 4 years after PT. Among the patients with aganglionic bowel resection, those who underwent the Soave procedure (SP) had an increase (0.56/day) in stool frequency than those who underwent the Duhamel procedure (DP). The soiling severity according to the AS was similar after 5 years of age. More severe soiling was better associated with patients who underwent the SP than those who underwent the DP. The constipation severity increased gradually until around 5 years and declined thereafter. More severe constipation was better associated with the DP than with the SP.

Conclusion: The result of the analysis of stool frequency and soiling in patients with HD indicated that shorter ASs resulted in fewer bowel movements and less severe soiling. However, with the increase in patient age, the differences became similar. Compared to the DP, the SP was associated with an increased frequency of bowel movements and soiling severity; however, the constipation severity was lower.