regional lymph node dissection

Definition of regional lymph node dissection
National Cancer Institute

regional lymph node dissection

(REE-juh-nul limf node dy-SEK-shun)
A surgical procedure to remove some of the lymph nodes that drain lymph from the area around a tumor. The lymph nodes are then examined under a microscope to see if cancer cells have spread to them.

Source: NCI Dictionary of Cancer Terms