Paediatric patient presenting with headache. The patient is afebrile and does not have any other neurologic or visual deficits.
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Selected MRI sequences show a well-defined round mass centered within the trigone of the left lateral ventricle. The mass is isointense to gray matter on T1 and T2-weighted images, and exhibits homogeneous enhancement. Perilesional white matter edema and obstructive hydrocephalus are seen.
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Meningioma is the most common extra-axial neoplasm of adults and accounts for 15% of all intracranial neoplasms. It is second to gliomas in overall prevalence. Meningiomas are most frequently seen in convexity and parasagittal locations. In children, the most common site is the ventricles.
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