Robot/Laparoscopic-Assisted Transanal Transection Duhamel Versus Modified Soave Pull-Through for TCA

Total colonic Hirschsprung disease (TCA), also referred to as total colonic aganglionosis, represents the most severe phenotype of Hirschsprung disease and remains a major surgical challenge. Owing to extensive aganglionosis, poor nutritional status, and high risk of enterocolitis in the neonatal period, the current standard of care in most centers consists of neonatal enterostomy followed by a delayed definitive pull-through as a second-stage procedure. Despite advances in minimally invasive techniques, the optimal reconstructive strategy for TCA has not been established.

Among available options, the Duhamel procedure and the modified Soave pull-through are the two most commonly adopted techniques. The Duhamel approach, particularly when combined with a transanal external transection, preserves a retrorectal colonic reservoir, which may reduce anastomotic tension and theoretically improve postoperative bowel function. However, concerns remain regarding fecal stasis, residual spur formation, and the potential risk of postoperative enterocolitis. In contrast, the modified Soave procedure achieves complete endorectal pull-through and eliminates the aganglionic rectal segment, but it may be associated with a higher incidence of anastomotic stricture, cuff-related obstruction, and impaired anorectal motility, especially in patients with extensive disease such as TCA.

With the increasing adoption of robot-assisted and laparoscopic techniques, both procedures have been refined; nevertheless, direct comparative data evaluating functional outcomes, Hirschsprung-associated enterocolitis, and perioperative parameters between transanal transection Duhamel and modified Soave procedures-particularly in total colonic disease-remain scarce. To date, no multicenter study has provided a detailed, standardized comparison of these two surgical strategies in patients with pathologically confirmed TCA.

Therefore, this multicenter study aims to compare robot-assisted transanal transection Duhamel and modified Soave pull-through in patients with total colonic Hirschsprung disease who underwent neonatal enterostomy, with a primary focus on postoperative bowel function and the incidence of Hirschsprung-associated enterocolitis.

Inclusion criteria

• Definitive diagnosis of total colonic Hirschsprung disease confirmed by pathology from biopsy at neonatal enterostomy, consistent with total colonic aganglionosis.
• Two-stage surgical strategy: neonatal enterostomy performed first, followed by definitive pull-through as a second-stage procedure.
• Planned definitive reconstruction by one of the following techniques:
• Robot-assisted transanal transection Duhamel, orModified Soave pull-through (minimally invasive abdominal phase allowed).
• Availability for follow-up assessments and outcomes collection per protocol.

Exclusion criteria

• Trisomy 21 (Down syndrome).
• Definitive surgery performed by open laparotomy approach or Swenson procedure.
• One-stage primary pull-through without neonatal enterostomy (single-stage definitive management).