Variability of the transition zone length in Hirschsprung’s disease

Retrospective study of 48 pediatric patients demonstrates high variability in Hirschsprung disease transition zone length (median 1.7 cm, range 0.3-22.9 cm), with 23% exceeding 5 cm. Findings advocate for routine intraoperative frozen section review of the proximal donut to prevent transition zone pull-through complications.