“…A multitude of intracranial pathologies requiring surgery can safely be addressed using a keyhole craniotomy. 7,8,10,11,16,18,21,24,26,28,36,38 The term "keyhole" is relative because there is no size at which a craniotomy becomes too large or too small to be considered keyhole surgery. Rather, it is a philosophical approach to treating tumors, wherein the smallest feasible craniotomy is made to achieve the goals of resection.…”