Local Excision for Early-Stage Rectal Adenocarcinomas.

Although total mesorectal excision (TME) remains the standard of care for rectal cancer, including early-stage T1/T2 rectal adenocarcinoma, local excision may be warranted for these early-stage tumors in a select group of patients who may decline surgery or may be nonoptimal surgical candidates. Operative approaches for transanal local excision include transanal endoscopic microsurgery or transanal minimally invasive surgery for tumors <4 cm, occupying <40% of the rectal circumference and <10 cm from the dentate line. The use of preoperative chemoradiation therapy may help to downstage tumors and allow for more limited resections, and chemoradiation may also be employed postoperatively. Local excision approaches appear to result in improved quality of life compared with TME, but limited resections may also compromise survival rates compared with TME. Multidisciplinary management and shared decision-making can allow for the desired patient outcomes.