Fig.28. Giant meningioma of the cerebellum tentorium, apex and posterior side of the temporal bone pyramid. Total removal of the tumor with the help of a retrosigmoid approach.
A - MRI findings before an operation; B - MRI findings after it; C - main stages of the operation: 1 - meningioma posterior pole is exposed; 2 - a capsule is separated from the acoustic-facial group of nerves; 3 - separation of the tumor oral pole from the Vth nerve; 4 - exposure of the vertebral artery; 6- the brain stem after meningioma resection.