Fig.29. Meningiomas of the clivus upper segment.
A - MRI findings before an operation; B - MRI findings after it; C - stages of the tumor removal with the help of a transpyramidal supratranstentorial approach: 1 - the basilar artery and one of its perforating branches; 2 - the tumor; 3 - the tumor fragmentation; 4 - the tumor is resected, the basilar artery is seen; 5 - the cerebral peduncle; 6 - a bed of the resected tumor.