What is "abdominoperineal resection"

n. (context medical surgery English) Surgery to remove a portion of the large intestine and surrounding lymph nodes through incisions in the abdomen and perineum.(R:MW3 1976: page=3)

An abdomino perineal resection, formally known as abdominoperineal resection of the rectum and abdominoperineal excision of the rectum or simply abdominoperineal excision, or the Miles operation is a surgery for rectal cancer or anal cancer. It is frequently abbreviated as AP resection, APR and APER.