Distribution of the 23 primary meningioma tumors along the three calculated principal components, PC1, PC2 and PC3. Tumor cases are color coded by histopathological grade. Red, Grade 1; Green, Grade 2; and Blue, Grade 3. Full size image Histopathological characteristics Since the Grade 2 ...
Thirty-one cases of petroclival meningioma have been operated on during a 4-year period using two different philosophies as far as the approach. Group A patients (13 cases) have been operated on using mostly either a subtemporal transtentorial or a retrosigmoid approach. Group B patients (18...