Benign neck masses showing restricted diffusion: Is there a histological basis for discordant behavior?

Figure 4 Craniofacial meningioma in a 7-year-old girl. A: Axial T1W image shows isointense homogenous mass involving bilateral cavernous sinuses (solid arrows) encasing bilateral ICAs and extending to right orbit causing proptosis (dashed arrow); B: Coronal T2W image shows intracranial extension in right middle cranial fossa (solid arrow) with mild perilesional edema in adjacent cerebral parenchyma (dashed arrow); C: Sagittal T1W FS post-gadolinium image reveals intense homogeneous enhancement in the mass; D: ADC map showing homogenous restricted diffusion in the mass; E: Photomicrograph show tumour composed of spindled to polygonal cells with moderate amount of cytoplasm, vesicular nuclei and whorl formation at places (H-E; original magnification: × 400). ADC: Apparent diffusion coefficient; ICA: Internal carotid artery.