The hematoma is evacuated through a burr hole or craniotomy. Large or symptomatic hematomas require a craniotomy. Emergency treatment requires decompression of the haematoma, usually by craniotomy. Large hematomas and blood clots may require an open craniotomy. These include transsphenoidal hypophysectomy, open craniotomy, and stereotactic radiosurgery. These methods include transsphenoidal hypophysectomy, open craniotomy, and stereotactic radiosurgery. Once under general anesthesia, an incision will allow for a craniotomy to be performed. In penetrating brain injury, damaged tissue is surgically debrided, and craniotomy may be needed. Dr. Berensteiner tells Gordon that he has an arteriovenous malformation, and needs a ("Craniotomy"). Craniotomy and surgical evacuation is required if there is significant pressure effect on the brain. Cortical stimulation mapping is an invasive procedure that has to be completed during a craniotomy. They are implanted under the skull during a surgery called a craniotomy. The surgeons perform a craniotomy to remove the tumor. Treatment is generally by urgent surgery in the form of a craniotomy or burr hole. Also the name for the surgery changed from trepanning to craniotomy.