Papillary tumor of pineal region with an unusual clinical pr
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Pineal region tumors account for <1% of all intracranial tumors. Primary tumors of the pineal region with papillary features are very rare, and these include papillary pineal parenchymal tumors, papillary ependymoma, choroid plexus papilloma, papillary meningioma and germ cell tumors. Based on the immunophenotypic and ultrastructural findings, PTPR has been shown to arise from specialized ependymocytes of the subcommissural organ located in the lining of the posterior commissure and show ependymal differentiation.

This article reports an unusual presentation of PTPR in a 17-year-old girl, which was extending into the third ventricle, along with a detailed description of morphological and immunohistochemical characteristics of PTPRs. The diagnosis of PTPR was established on immunohistopathological examination...

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