Fig. 9.7 Case 5. Preoperative axial (a), coronal (b), and
sagittal (c) T1-weighted magnetic resonance images with
gadolinium showing the large falcotentorial type of menin-
gioma. Preoperative CT venography shows stenosis of the
vein of Galen (d). Postoperative axial (e), coronal (f),
and sagittal g) T1-weighted magnetic resonance images
with gadolinium showing subtotal resection of the tumor
via a posterior interhemispheric transtentorial approach.