Embolization is performed to cut off or disrupt the blood supply in order to shrink or kill a tumor. A Chemoembolization treatment is a form of targeted radiation therapy utilized to treat liver cancer tumors. Microscopic spheres that emit chemotherapy are injected through a catheter directly into the blood vessels that feed the tumor, simultaneously cutting off the blood supply while also emitting chemotherapy directly into the tumor.

Success rates vary widely depending on the type of cancer treated and the type of embolization performed.