[Late study results following megacolon operations].

Area of Science:

• Pediatric Surgery
• Gastroenterology
• Developmental Biology

Context:

• Hirschsprung's disease is characterized by a congenital absence of ganglion cells in the distal bowel, leading to functional obstruction.
• Current therapy involves surgical resection of the aganglionic segment.
• Residual aganglionic tissue and internal anal sphincter dysfunction can complicate postoperative outcomes.

Purpose:

• To evaluate the long-term functional outcomes and complication rates following surgical management of Hirschsprung's disease.
• To assess the impact of residual aganglionic segments and internal anal sphincter achalasia on postoperative results.
• To determine the spontaneous regeneration potential and overall prognosis in patients with Hirschsprung's disease.

Summary:

• The primary pathophysiologic issue in Hirschsprung's disease is functional obstruction due to defective intramural nerve supply and internal anal sphincter achalasia.
• Postoperative results depend on the equilibrium between normal colon and remaining aganglionic segments.
• Complications like enterocolitis, encopresis, and constipation occur in about one-third of patients initially, but significantly decrease over time.

Impact:

• Long-term follow-up shows a significant reduction in postoperative complications, with enterocolitis, chronic constipation, and encopresis rates decreasing substantially five years post-surgery.
• The study indicates a tendency towards spontaneous regeneration, suggesting improved function with time.
• The overall prognosis for Hirschsprung's disease is favorable, with approximately 90% of cases curable with appropriate surgical intervention.