Background: Knowledge of the extent of aganglionic bowel is important for preoperative planning of trans-anal surgery in patients with Hirschsprung's disease (HD).
Objective: To evaluate the accuracy of the transition zone, as identified by contrast enema study, for identifying the extent of aganglionic bowel.
Materials And Methods: A total of 32 patients with preoperative contrast enema studies and pathologic identification of aganglionic extent were reviewed.