Transanal Endoscopic Surgery

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** An endoscopic surgical procedure designed to give transanal access to resecting benign, premalignant, or early malignant lesions in the mid- to proximal rectum. Transanal endoscopic microsurgery (TEM) and transanal endoscopic operation (TEO) are rigid platforms, whereas transanal minimally invasive surgery (TAMIS) is a flexible platform.

**Synonyms:** - TES