Clinical Research Directory

Inclusion Criteria: 1. Patients 18 years or older 2. One to three brain metastases targets, all smaller than 3 cm in diameter (intact or resected tumor bed) 3. Eastern cooperative Oncology Group (ECOG) performance status 0-2 (score of 0, no symptoms; 1, mild symptoms; 2, symptomatic, \<50% in bed during the day) 4. Ability to answer questions and follow commands via neurocognitive testing 5. Estimated life expectancy greater than 6 months 6. Pathologic confirmation of extracerebral tumor site (eg, lung, breast, prostate) from either the primary site or a metastatic lesion 7. Willingness/Ability to undergo brain MRI scans 8. Able to give informed consent Exclusion Criteria: 1. Pregnant or nursing women 2. Women of childbearing potential unwilling to use adequate contraception 3. Inability to complete a magnetic resonance imaging scan with contrast 4. Tumor directly invading the critical area to be spared (for example a patient with tumor invading a critical white matter tract; ineligible for cognitive-sparing) 5. Planned chemotherapy during SRS (on the day of SRS) 6. Previous whole brain radiation therapy 7. Leptomeningeal metastases (ineligible for SRS) 8. Metastases from primary germ cell tumor, small cell carcinoma, or primary CNS lymphoma (ineligible for SRS)