Per-Anal Endoscopic Myotomy as Rescue Therapy for Hirschsprung Disease After Unsuccessful Surgical Myectomy.

Hirschsprung disease (HD) may affect short, ultrashort, or long segments of the rectum. Invasive endoscopy has gained popularity in its treatment. We report a case of a 9-year-old girl diagnosed with HD at 4-year-old, at which time she underwent a myectomy. Nonetheless, because of the persistence of clinical symptoms such as bowel movements every 5-7 days and abdominal distension, per-anal endoscopic myotomy was recommended. An anterograde myotomy in the posterior wall was performed to the circular layer of the muscularis propria. At the 3-year follow-up, she has continued daily bowel movements without laxatives.