| Investigations |
|---|
| Clinical history and physical exam | Clinical history, prior therapies, drug use, neurological examination |
|---|
| Hematology | Hemoglobin, white blood count, platelet count, creatinine |
| Adverse events | Baseline adverse event (baseline neurological symptoms and any post-surgery adverse events) recorded according to NCI CTCAE v. 4.0 |
| KPS | See appendix 1 |
| Visual acuity | |
| Visual field | |
| Speech discrimination | |
| Audiometric threshold | |
| BNS/BPS | |
| House Brackmann | |
| Radiology | Volumetric (1–3 mm thin slices) gadolinium-enhanced MRI |
