<prompt> Stereotactic radiosurgery is done for:Glioblastoma multiformeMedulloblastoma spinal cordEpendymomaAV malformation of brain  <response>: Ans. d AV malformation of brainRef: Sabiston 19e p 1900-1902 Stereotactic Surgery involves delivery of concentrated dose of RT to a defined volume of brain using Gamma knife or modified linear accelerator Used in Metastatic tumors AV malformations Benign Cranial nerve lesions Trigeminal neuralgia 