Supratentorial medulloblastoma mimicking a meningioma in an adult: a case report
DOI:
https://doi.org/10.59156/mxc0wy88Keywords:
Brain neoplasms, Medulloblastoma, Meningioma, SupratentorialAbstract
Background: medulloblastoma is a malignant tumor characteristic of childhood, usually located in the posterior fossa; however, it can also occur in adults, where it represents less than 1% of primary tumors of the central nervous system. Supratentorial and extra-axial locations are exceptional, and the clinical presentation depends on the tumor's location. Diagnosis is based on brain magnetic resonance imaging, and the standard treatment consists of surgical resection followed by radiotherapy and chemotherapy.
Objectives: to report a case of supratentorial medulloblastoma in an adult patient whose radiological presentation mimicked a meningioma.
Case description: a 28-year-old woman, with no relevant medical history, presented with frontal headache of two months' duration associated with bilateral tinnitus. She subsequently developed nausea, recurrent vomiting, retrograde amnesia, and episodes of psychomotor agitation. Neurological examination revealed frontal lobe syndrome. Magnetic resonance imaging showed a left frontal extra-axial lesion with intense enhancement after contrast administration and a dural tail sign, suggestive of a meningioma.
Surgery: a left frontal craniotomy was performed with macroscopically complete microsurgical resection of the lesion, initially considered to be of extra-axial origin. Histopathological and immunohistochemical studies were consistent with desmoplastic variant medulloblastoma.
Conclusion: adult extra-axial supratentorial medulloblastoma is an extremely rare entity that can mimic a meningioma due to its imaging characteristics. Therefore, it should be included in the differential diagnosis of extra-axial intracranial lesions.
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References
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