A craniotomy is a surgical procedure in which a bone flap is removed from the skull, to access the brain. The amount of skull that needs to be removed depends to a large extent on the type of surgery being performed. The bone flap is then replaced using titanium plates and screws or another form of fixation (wire, suture, ...etc).

Craniotomy is any bony opening that is cut into the skull. A section of skull, called a bone flap, is removed to access the brain underneath. There are many types of craniotomies, which are named according to the area of skull to be removed Craniotomy is a surgical procedure where the brain is accessed by making a "window" in the skull. The most common reasons a craniotomy may be needed are: Brain Injury, Brain Tumors, Aneurysm and Arteriovenous Malformation.