Collision tumor of primary malignant lymphoma and meningioma have not been described in the literature. The morphological aspect is interesting with regard to the problem of collision tumors. Collision tumors composed of glioma and meningioma are rare occurrences and only few cases in the brain have been described in the literature. Prayson et al. reported a 87-year-old woman with collision tumors that consisted of syncytial meningioma (WHO grade and malignant astrocytoma (WHO grade III) .Vasquero et al. reported a 75-year-old woman who had a collision tumor composed of psammomatous meningioma and glioblastoma multiforme. The term âcollisionâ has been used for the cases in which two tumors are being intermixed or appear close to each other without brain tissue in between gliomas and meningiomas are the most frequently reported combination of histologically different brain tumors. Central neurocytoma is a rare intraventricular brain tumor that affects young adults and presents with increased intracranial pressure secondary to obstructive hydrocephalus and NSE (strongly) positive.
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Last date updated on June, 2014