Abstract
Intracranial primary collision tumors of different histologic types are rare, and their occurrence is still unclear. We describe a 66-year-old female who presented with headache, nausea, and vomiting. Magnetic resonance imaging scan showed that there were 2 primary intracranial tumors occurring simultaneously at adjacent sites of the right cerebral hemisphere. Tumor pathology showed 2 distinct tumors: meningioma (World Health Organization I) and glioblastoma. This is a rare case in which 2 different intracranial primary tumors occurred at adjacent sites, but the patient had no history of head trauma, neurologic surgery, or radiation therapy. According to previous and present reports, the most common type of intracranial primary collision tumor is composed of a benign meningioma and a glioblastoma. During the occurrence of collision tumors, 1 tumor can play a role in the formation and growth of the other.
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