Selective Internal Radiation Therapy (SIRT) in Patients With Unresectable Colorectal Cancer Liver Metastases Who Failed Prior Intraarterial Pump Chemotherapy

This study is being done with a new therapy called "Selective Internal Radiation Therapy"
(known as SIRT). Radiation is an effective treatment for destroying tumors. It is widely
used in cancer treatment. However, radiation can harm normal tissue. SIR-Spheres are tiny
plastic beads. They contain a radioactive agent called Yttrium-90. These beads can be
delivered through a small tube inserted into the blood vessel that goes directly to the
tumor. The radiation goes directly to the tumor. This spares healthy parts of your liver.