Pre-operative SRS or Post-operative SRS in Treating Cancer Patients With Brain Metastases

PRIMARY OBJECTIVE: I. To investigate the 1 year leptomeningeal disease (LMD)‐free rate among patients with surgically resectable metastatic brain lesions randomized to post‐operative stereotactic radiosurgery (SRS) (standard care) versus pre‐operative SRS followed by surgery (experimental arm). SECONDARY OBJECTIVE: I. To investigate the local control (LC), distant brain metastasis rate, overall survival (OS) of pre‐operative (pre‐op) versus (vs) post‐operative (post‐op) SRS in patients with brain metastasis. EXPLORATORY OBJECTIVES: I. To assess the reliability of different imaging features by using a combination of patient data and phantom data to quantify the uncertainties associated with using magnetic resonance imaging (MRI) for radiomics studies. II. To assess the correlation of imaging‐pathology correlates using multiparametric imaging that characterize the tumor and peri‐tumoral microenvironment including features such as tumor vascular characteristics, cellular density, oxygenation and presence of inflammation/immune reactivity. III. To investigate the neuro‐cognitive impact, patient reported outcomes and health‐related quality of life of pre‐operative (pre‐op) vs post‐operative (post‐op) SRS in patients with brain metastasis. OUTLINE: Patients are randomized to 1 of 2 groups. GROUP I (PRE‐OPERATIVE SRS): Patients undergo SRS within 15 days of randomization followed by surgery within 15 days. Patients may undergo additional SRS if disease returns after treatment. GROUP II (POST‐OPERATIVE SRS): Patients undergo surgery within 15 days of randomization followed by standard of care SRS within 30 days. Patients may undergo additional SRS if disease returns after treatment. After completion of study treatment, patients are followed up periodically.