Hemangiopericytoma of the orbit is a rare tumor with unpredictable bio
logical behavior. Only about 83 cases have been reported in the Englis
h language. This article reports on a primary orbital hemangiopericyto
ma is that presented in an atypical fashion with recurrent orbital hem
orrhage. An emergency exenteration was needed to control the hemorrhag
e. Additionally, the clinical, surgical, and histologic features are d
escribed, and the pertinent literature is reviewed.