Share Print

Gamma Knife

GammaKnife The Gamma Knife is an advanced form of external beam radiation therapy that uses gamma rays to treat benign or malignant brain tumors.

It’s not actually a knife — there is no surgery involved. Instead, the Gamma Knife works by focusing more than 200 beams of radiation on a tumor. It’s ideal for tumors that are inoperable or near critical structures in the head, such as the brain stem or cranial nerves. It’s also an option for patients who have multiple tumors or for those whose age or medical condition rules out surgery.

At the Siteman Cancer Center, we jointly operate the St. Louis area’s only Gamma Knife in cooperation with Barnes-Jewish Hospital, Washington University School of Medicine and HealthSouth. Since Gamma Knife of St. Louis opened in 1998, thousands of patients have benefited from this type of radiation therapy technology. 

Learn more at Gamma Knife of St. Louis