Posterior myectomy for primary and secondary short segment aganglionosis.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008531:Megacolon / Q000000981:diagnostic imaging / Q000601:surgery*; D009130:Muscle, Smooth / Q000601:surgery*; D011859:Radiography; D012007:Rectum / Q000601:surgery