Second numbing shot may cut opioid use after sarcoma surgery

This study tests whether giving a second numbing injection (quadratus lumborum block) after surgery for a rare abdominal cancer (retroperitoneal sarcoma) can reduce the need for opioid painkillers. About 113 adults having open surgery for sarcoma will receive either one or two injections of a long-acting numbing medicine. The goal is to see if the extra injection helps more patients go home without needing opioid prescriptions, lowering the risk of long-term use or addiction.