Craniotomy is a surgical procedure where part of the skull is temporarily removed to access the brain. It can be used to treat conditions like tumors, blood clots, epilepsy, brain injuries, and strokes. The surgical procedure involves making an incision in the scalp, lifting the skin and muscles, cutting and removing part of the skull (bone flap), performing surgery on the brain, then replacing the bone flap and closing the incision. Risks include infection, hemorrhage, seizures, and brain swelling while benefits are being cured of the underlying issue. Outcomes depend on the condition being treated but complications can include infections, blood clots, and in rare cases death.