Brain Surgery, Conditions & Treatments Conditions and Disorders Pituitary Tumors Meningioma Craniopharyngioma Rathke's Cyst Glioblastoma Metastatic Brain Tumor Chiari Malformation Hydrocephalus Trigeminal Neuralgia Treatments Gamma Knife Surgery® Endonasal Transsphenoidal Surgery Keyhole Craniotomy Craniotomy with Mapping Whole Brain Radiotherapy Posterior Fossa Decompression Endoscopic Third Ventriculostomy (ETV) Ventriculoperitoneal Shunt (VPS) Microvascular Decompression (Keyhole Craniotomy)