A craniotomy might be performed to relieve pressure within the brain, to diagnose or remove a brain tumor, to repair an aneurysm or skull fracture, or to remove a blood clot.
Craniotomy surgeries vary in size. Small ones are called burr-hole or keyhole craniotomies. Neurosurgeons make a dime-sized hole for minimally invasive procedures. Burr hole or keyhole craniotomies are used for minimally invasive procedures to:
- Clip aneurysms
- Drain a blood clot
- Insert a shunt to drain cerebrospinal fluid (CSF)
- Insert a stimulator to treat Parkinson's disease
- Remove tumors or brain tissue for biopsy
- Address a brain injury caused by trauma