Primary hemangiopericytoma in parietal bone: literature review and case report.

Background: Hemangiopericytoma (HPC) is a tumor originating from pericytes surrounding the capillary walls. Most HPCs grow slowly, but some display aggressive growth. Treatment for HPC is total resection or resection plus adjuvant radiation.

Case Presentation: A 14-year-old girl presented with a blood vessel-rich tumor with a smooth surface located on the left side of the parietal bone, attached to the inner surface of the skull. The dura was completely intact. The final diagnosis was HPC based on the histopathologic and immunohistochemical findings. The patient underwent total resection of the tumor and cranioplasty. The dura was not incised because of the lack of invasive growth. Within the 2-year follow-up, the patient showed an excellent prognosis without any local recurrence or positive radiologic features.

Conclusion: The patient presented with common intracranial hypertension symptoms. A blood vessel-rich tumor with a smooth surface was attached to the inner surface of the skull with the dura completely intact. Simple surgical resection without radiotherapy offered an excellent prognosis during 2 years of follow-up.