Home English Liver Mets – What is SIRT? Liver Mets – What is SIRT? Share on Facebook Share on LinkedIn Share on Twitter Copy this URL Share via Email If liver tumors, sometimes called “liver metastases” or “liver mets,” are not able to be surgically removed due to the size, location or number, other treatments may be used to shrink the tumors. One treatment option that may be available is Selective Internal Radiation Therapy (SIRT). In this fact sheet we address: How it works & the side effects New research on SIRT Insurance coverage download the fact sheet