SAN FRANCISCO--(BUSINESS WIRE)--The results of a large multi-center clinical study re-affirming the safety and efficacy of Selective Internal Radiation Therapy (SIRT) with SIR-Spheres® microspheres in patients with metastatic colorectal cancer were presented today at the American Society of Clinical Oncology’s 2013 Gastrointestinal Cancers Symposium.1,2 The data were presented by lead investigator Andrew S. Kennedy, M.D., F.A.C.R.O., Director, Radiation Oncology Research Sarah Cannon Research Institute, Nashville, TN.