Purpose: To report the clinicopathologic findings in patient with optic nerve sheath hemangiopericytoma.
Design: Clinicopathologic report.
Methods: The clinical, histologic, and immunohistochemical findings of a patient with optic nerve sheath hemangiopericytoma were reviewed.
Results: An excisional biopsy of an optic nerve sheath tumor from a 35-year-old woman showed a staghorn vascular pattern consisting of CD34-positive tumor cells.
Conclusions: Hemangiopericytoma may occur rarely in the optic nerve sheath.