Yttrium Micro Embolization
The American Cancer Society estimates that nearly 19,000 new cases of primary liver cancer will be diagnosed in the US in 2004 and that more than 14,000 will die from the disease. Unlike most other cancers, the number of liver cancers is rising.
The Radiology and Radiation Oncology departments at EJGH have joined forces to offer a new treatment for patients with primary and metastatic liver cancer. It offers not only a new therapy option, but also a less invasive procedure with fewer side effects.
This cutting edge procedure, called Yttrium Microsphere Embolization, uses tiny particles injected directly into the blood supply of a liver tumor. The particles, or microspheres, are impregnated with a radioactive compound that delivers radiation to malignant cells while reducing damage to surrounding healthy tissue compared to other forms of radiation therapy. In addition, the microspheres block blood flow to the tumor, starving it of the nutrients it needs to grow.
Before a patient undergoes Yttrium Microsphere Embolization, an arteriogram is performed. This radiologic exam uses an injected dye to visualize the blood vessels surrounding the tumor. The results of the arteriogram are used to determine if the patient is a good candidate, and to provide a map of the vessels that will be used to deliver the microspheres.
The procedure is performed by an interventional radiologist via a catheter inserted through an artery. The catheter is guided through the body and into the liver through the hepatic artery, the main vessel carrying blood into the liver. From the hepatic artery, the microspheres are injected and travel with the normal flow of blood to reach the capillaries that supply the cancer.
The procedure is being used for patients whose tumors cannot be removed surgically or have not responded to other treatments. Liver cancer is difficult to treat because liver tumors have unpredictable growth patterns and symptoms often appear only when the cancer is in advanced stages. Also, many patients diagnosed with liver cancer have Hepatitis B, Hepatitis C, or cirrhosis. These conditions make surgery difficult because patients may have very little healthy liver tissue left.
Because it is minimally invasive, it presents fewer risks, such as infection and complications from anesthesia, than traditional open surgery. Most patients who undergo Yttrium Microsphere Embolization can return home on the day of their procedure.