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Intracranial hemangiopericytomas are a rare type of primary brain tumor, representing only about 0.5% of all primary brain tumors. Even more rare is the co-existence of two juxtaposed primary brain tumors, termed a “collision” tumor. This report provides the first documentation in the literature of a hemangiopericytoma colliding with a meningioma, and recurring after treatment with gross total resection...
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