Presentation
Headache and convulsions
Patient Data
Large extra-axial mass with a broad dural base at the right temporoparietal region. It is of homogeneous texture and well-circumscribed margins. It is isointense to grey matter on T1, hyperintense on T2 and FLAIR. It exerts a mass effect in the form of compressing underlying brain parenchyma, right lateral ventricle, and midline shift to the left side and compression upon the right crus of the midbrain. It is associated with an adjacent cystic lesion that shows intermediate signal on T1, incomplete suppression on FLAIR and free diffusion.
Case Discussion
Such imaging features are typical for convexity meningioma. The cystic lesion adjacent to the tumor mass can be considered as belongs to intracranial non-neoplastic tumor-associated cysts between the meningioma and the brain and so it is considered as a type 5 cystic meningioma.