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Related Experiment Videos

Rectal biopsy: what is the optimal procedure?

Hiroyuki Kobayashi1, Zhixin Li, Atsuyuki Yamataka

  • 1Department of Paediatric Surgery, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan. koba@med.juntendo.ac.jp

Pediatric Surgery International
|February 25, 2003
PubMed
Summary

A new rectal suction biopsy technique using nasal cutting forceps yields larger specimens, improving diagnosis of Hirschsprung

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Area of Science:

  • Gastroenterology
  • Pediatric Surgery
  • Histopathology

Background:

  • Rectal suction biopsy (RSB) is crucial for diagnosing bowel motility disorders like Hirschsprung's disease (HD).
  • Optimal methods for obtaining adequate rectal tissue for diagnosis remain under investigation.

Purpose of the Study:

  • To introduce and evaluate a novel rectal biopsy technique using Gruenwald's nasal cutting forceps (NCF).
  • To compare the efficacy and safety of the NCF technique with conventional blind RSB for diagnosing HD and other conditions.

Main Methods:

  • A retrospective study comparing two groups of rectal biopsies (n=130) performed between 1986-1999.
  • Group I (n=68) used conventional blind RSB at three sites (2, 3, 5 cm above dentate line).
  • Group II (n=62) used NCF for single-site biopsies (2 cm above dentate line) under direct vision after anal dilatation.

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Main Results:

  • NCF technique yielded significantly larger biopsy specimens (4.39 mm²) compared to conventional RSB (1.59 mm²).
  • Conventional RSB resulted in inadequate specimen size in 26% of cases, requiring repeat biopsies.
  • The NCF technique demonstrated improved diagnostic accuracy for HD and intestinal neuronal dysplasia (IND), with no reported complications.

Conclusions:

  • The NCF technique offers a safe, advantageous, and histopathologically accurate method for rectal biopsy.
  • Single-site biopsies using NCF at 2 cm above the dentate line are sufficient for diagnosing HD and IND.
  • This improved technique enhances diagnostic yield and reduces the need for repeat procedures in pediatric patients.