concept of biopsy of brain tissue. surgeon holding puncture needle and is preparing to puncture of the brain to capture nerve cell

astrocytoma background biopsy brain cancer capture cell cerebellum concept cranial diagnosis diagnostics disease disorder doctor expect glioma head hold idea illness image invasive malignant meningioma metastases microscope needle neoplasm nerve neurological neurology neuroscience neurosurgery oncology operation parkinson picture preparing procedure punch puncture recovery science stem stereotactic stroke surgeon tissue tumor