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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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Initial experience with transanal endoscopic microsurgery: the need for understanding the limitations.

Emily Steinhagen1, Gerard Chang, José G Guillem

  • 1Department of Surgery, Colorectal Service, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, C-1077, New York, NY 10065, USA.

Journal of Gastrointestinal Surgery : Official Journal of the Society for Surgery of the Alimentary Tract
|April 12, 2011
PubMed
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Transanal endoscopic microsurgery (TEM) is effective for benign rectal tumors and early-stage cancers. While offering benefits over other methods, careful patient selection is crucial for invasive adenocarcinoma due to potential recurrence risks.

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Area of Science:

  • Colorectal Surgery
  • Minimally Invasive Procedures
  • Oncology

Background:

  • Transanal endoscopic microsurgery (TEM) offers an alternative to traditional transanal excision and radical surgery for rectal tumors.
  • TEM provides enhanced visualization, improved access to proximal lesions, and higher rates of negative margins compared to transanal excision.
  • While TEM is associated with lower morbidity and mortality than radical resection, it may present a higher risk of local recurrence.

Purpose of the Study:

  • To evaluate the efficacy and outcomes of transanal endoscopic microsurgery (TEM) for a range of rectal lesions.
  • To assess the complication rates and recurrence patterns following TEM procedures.
  • To determine the suitability of TEM for benign and early-stage malignant rectal conditions.

Main Methods:

  • A retrospective review was conducted on a prospectively maintained database of patients undergoing transanal endoscopic microsurgery.
  • Data collected included patient demographics, lesion types, procedural outcomes, complications, and follow-up data.

Main Results:

  • Ninety-six TEM procedures were performed on 93 patients for carcinoid tumors, adenomas, and various stages of adenocarcinoma.
  • The overall success rate for TEM was 81.2%, with a complication rate of 11.5%.
  • Recurrences were observed in 12.1% of cases, including adenomas, in situ carcinomas, and one T2 invasive lesion, with a mean follow-up of 25.9 months.

Conclusions:

  • Transanal endoscopic microsurgery is a suitable treatment for benign rectal lesions like carcinoid tumors and adenomas.
  • TEM can be curative for carefully selected early-stage invasive rectal cancers.
  • For invasive adenocarcinomas, TEM should be reserved for low-risk cases in patients aware of the potential for increased local recurrence.