Transanal endoscopic microsurgery

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Transanal endoscopic microsurgery is a technique for resection of some focal T1 stage rectal cancers.

Features of a rectal cancer that may make it a candidate for this approach

  • well- or moderately-differentiated tumors that are T1 N0 M0 (confined to submucosa without spread)
  • <3 cm
  • within 8 cm of the anal verge
  • involve less than 30% of the wall circumference