Prospective study of the functional results of transanal endoscopic microsurgery

Huann Sheng Wang*, Jen Kou Lin, Shung Haur Yang, Jeng Kae Jiang, Wei Shong Chen, Tzu Chen Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Background/Aims: Most clinical research addresses the technological advances and oncological outcomes of transanal endoscopic microsurgery. Our aim was to examine the functional results. Methodology: From August 1999 to November 2000, 22 Taiwanese patients (14 men, 8 women; median age, 68 years) undergoing transanal endoscopic microsurgery were prospectively examined. Functional questionnaires and anorectal manometry were assessed before surgery and at 2 weeks, 6 weeks, 3 months, and 1 year. Results: The median distance from the anal verge to the tumor was 10cm. The median tumor diameter was 2.0cm. The median duration of surgery was 120 minutes. No surgical mortality or morbidity and no local recurrence occurred during a median follow-up of 23 months. The mean stool frequency and consistency were significantly better at 3 months after surgery than before surgery. The maximal resting pressure significantly decreased after surgery. The maximal contraction pressure and maximal tolerated volume were significantly lower at 2 and 6 weeks than before surgery; these values recovered at 1 year. Conclusions: Transanal endoscopic microsurgery is safe for the cure of benign tumors and the palliative excision of malignant tumors in middle and upper rectum. Anorectal function was preserved and improved, though some anorectal manometric parameters changed over time.

Original languageEnglish
Pages (from-to)1376-1380
Number of pages5
Issue number53
StatePublished - Sep 2003


  • Anorectal manometry
  • Transanal endoscopic microsurgery


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