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Magnetic resonance imaging (MRI)-assisted laparoscopic anorectoplasty for imperforate anus: a single center

Tina T Thomas1, Daniel H Teitelbaum1, Ethan A Smith2

  • 1Department of Pediatric Surgery, C. S. Mott Children's Hospital, University of Michigan Health Care System, 1540 East Hospital Drive, SPC 4211, Ann Arbor, MI, 48109-4211, USA.

Pediatric Surgery International
|October 11, 2016
PubMed
Abstract

Insights

Magnetic Resonance Imaging-assisted Laparoscopic-Assisted Anorectoplasty (MRI-LAARP) precisely guides neorectum placement in high imperforate anus cases. This technique shows promising short-term outcomes for sphincter preservation and functional results.

Area of Science:

  • Pediatric Surgery
  • Medical Imaging
  • Anorectal Malformations

Background:

  • Traditional surgical approaches for high imperforate anus, such as posterior sagittal anorectoplasty (PSARP) and laparoscopic-assisted anorectoplasty (LAARP), have limitations.
  • PSARP can cause muscle injury and scarring, while standard LAARP may struggle with non-linear sphincter complex anatomy.

Purpose of the Study:

  • To evaluate the feasibility and initial outcomes of intraoperative Magnetic Resonance Imaging (MRI)-assisted Laparoscopic-Assisted Anorectoplasty (MRI-LAARP).
  • To assess the ability of MRI-LAARP to precisely guide neorectal placement through the center of the sphincter complex, minimizing muscle damage.

Main Methods:

  • Ten pediatric patients with high imperforate anus underwent MRI-LAARP.
  • Intraoperative MRI was utilized to delineate the sphincter complex and guide an MRI-compatible needle for precise placement.
  • The procedure was completed using standard LAARP techniques after needle guidance.

Main Results:

  • Successful MRI needle placement through the sphincter complex was achieved in all ten patients.
  • Nine patients underwent successful laparoscopic pull-through procedures; one required conversion to open surgery due to adhesions.
  • The average postoperative hospital stay was 5.4 days, with one patient experiencing mild anal anastomosis dehiscence requiring revision.

Conclusions:

  • MRI-LAARP offers a theoretical advantage by enabling neorectum placement through the sphincter complex without muscle transection.
  • Initial follow-up indicates good short-term results, but long-term assessment of sphincter and bowel function is necessary.
Keywords:
Anorectal malformationImperforate anusMRI-LAARP (laparoscopic-assisted anorectoplasty)MRI-assisted anal pull through

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