1) prior WBRT 2) prior resection of brain metastasis, SRS or Gamma knife. 3) > 3 brain metastases present on MRI 4) lymphoma, small cell lung cancer, leukemia, germ cell tumors. 5) leptomeningeal disease. 6) unknown primary.7) RPA Class III (i.e. KPS < 70) 8) pregnancy.