An "adrenalectomy - da Vinci / laparoscopic / retroperitoneal" refers to a surgical procedure to remove an adrenal gland using a minimally invasive technique where a surgeon operates through small incisions in the abdomen with the assistance of a robotic system (da Vinci), utilizing a laparoscopic approach, and accessing the adrenal gland from behind the peritoneum (retroperitoneal) to reach the target area with minimal disruption to surrounding tissues; essentially, a robotic-assisted laparoscopic surgery performed from the retroperitoneal space to remove an adrenal gland.