Hemangiopericytoma of the orbit treated with conservative surgery and radiotherapy.

A 23-year-old man had two recurrences following local excision of a hemangiopericytoma of the right orbit. A third local excision was followed by a course of postoperative radiation therapy (64.8 Gy [6480 rad] in 36 treatments). Seven and a half years following therapy, the patient is disease free and has experienced no side effects.