PMC3364074_01
Neuroimaging of case 1. CT scans before the surgical intervention (a, b) and 1 month later (c).
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F1
The computed tomography (CT) scan demonstrated marked ventriculomegaly as well as a well-delineated left-side temporoparietal lesion, consistent with a convexity meningioma (fig. 1a, b). The control CT examination showed no data for residual tumor as well as a slight decrease of the ventricular size (fig. 1c).
Histological findings of case 1. The tumor is composed of uniform cells with syncytial growth in sheets and lobules surrounded by thin stroma (WHO grade I meningothelial meningioma). HE, x200.
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F2
Histological examination revealed World Health Organization (WHO) grade I meningioma (fig. 2).
PMC3364074_02
Neuroimaging of case 2. CT and MRI scans 2 months before the admission (a, b), and CT scan just prior to surgical intervention (c).
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F3
The neuroimaging studies made before the admission demonstrated communicating hydrocephalus without any clinically significant lesions within the brain parenchyma (fig. 3a, b). The control CT scan revealed a heterodense tumor situated in the right frontotemporal region with compression and dislocation of the adjacent brain structures to the left (fig. 3c).
Histological findings of case 2. The tumor shows prominent cellular polymorphism, microvascular proliferation, and pseudopalisading necroses (WHO grade IV glioma, GBM). HE, x200.
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F4
Histologically, the tumor demonstrated typical features of GBM (WHO grade IV glioma; fig. 4).