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Related Experiment Video

Updated: May 1, 2026

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Transanal endoscopic microsurgery: a review.

Behrouz Heidary1, Terry P Phang1, Manoj J Raval1

  • 1The Department of Surgery, St. Paul's Hospital, University of British Columbia, Vancouver, BC.

Canadian Journal of Surgery. Journal Canadien De Chirurgie
|March 27, 2014
PubMed
Summary

Transanal endoscopic microsurgery (TEM) is effective for removing rectal adenomas and early cancers, offering a minimally invasive alternative to traditional surgery. This technique shows promise for various rectal conditions, advancing endoluminal surgical options.

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Area of Science:

  • Gastroenterology
  • Surgical Oncology
  • Colorectal Surgery

Background:

  • Rectal adenomas and cancers are common, with treatment varying by size and location.
  • Conventional methods like colonoscopy and transanal excision have limitations for mid- and upper-rectal lesions.
  • Radical resection is often required for difficult-to-reach rectal tumors.

Purpose of the Study:

  • To review the current applications and status of Transanal Endoscopic Microsurgery (TEM) for rectal lesions.
  • To evaluate TEM's efficacy compared to traditional surgical approaches.
  • To explore TEM's potential in advancing endoluminal surgery for rectal pathology.

Main Methods:

  • Review of existing literature on Transanal Endoscopic Microsurgery (TEM) since the 1980s.
  • Analysis of TEM's outcomes for various rectal conditions, including adenomas, early carcinomas, and other tumors.
  • Comparison of TEM with conventional and radical surgical techniques.

Main Results:

  • TEM is the preferred method for resecting endoscopically unresectable rectal adenomas, demonstrating low recurrence rates.
  • TEM shows potential benefits for select early T1 rectal cancers compared to radical surgery.
  • TEM is considered palliative or experimental for advanced rectal cancers but is safe for uncommon tumors like carcinoids.

Conclusions:

  • Transanal endoscopic microsurgery has evolved significantly, offering a valuable treatment option for specific rectal pathologies.
  • TEM provides a minimally invasive alternative, potentially expanding endoluminal surgical innovations for rectal conditions.
  • Further research may solidify TEM's role in treating a wider range of rectal lesions.