RecruitingPhase 3ProcedurePre-Operative or Post-Operative Stereotactic Radiosurgery in Treating Patients With Operative Metastatic Brain TumorsThis phase III trial studies the side effects and how well stereotactic radiosurgery (SRS) works before or after surgery in patients with tumors that has spread to the brain or that can be removed by surgery. Stereotactic radiosurgery is a specialized radiation therapy that delivers a single, high dose of radiation directly to the tumor and may cause less damage to normal tissue.