Glutamate Excitotoxicity in Brain Metastases From Lung, Breast and Melanoma Treated With Stereotactic Radiosurgery

Gamma Knife stereotactic radiosurgery (SRS-GK)

Serum Glu levels and Glu-regulation markers assessed prior to and following SRS-GK in BM or benign lesions or at baseline in non-BM patients.