Intracranial hemangiopericytoma after radiation treatment: first case in the literature.

Background: Radiation exposure is a known risk factor for meningioma but there are no data regarding hemangiopericytoma and radiation exposure.
Case Description: We report a 29-year-old pineoblastoma patient diagnosed with a hemangiopericytoma at a different location, after a successful surgical excision and adjuvant radiotherapy for the original tumor 4-year prior.
Conclusion: Hemangiopericytoma emergence can be seen after radiotherapy.