Hirschsprung disease is due to an arrest in neural cell ganglia , leading to absent innervation of a segment distal bowel .
Hirschsprung disease appears as a massively dilated segment of distal bowel on contrast enema .
Hirschsprung disease is due to an arrest in neural cell ganglia , leading to absent innervation of a segment distal bowel , and appears as a massively dilated segment of distal bowel on contrast enema .