Intraosseous hemophilic pseudotumor of the orbit.

Intraosseous hemophilic pseudotumor involving the orbit has not been described previously. A 14-year-old white male presented with a rapidly progressive, expansile right orbital mass consisting of hematoma contained within bony cortex. Computerized tomography revealed findings consistent with intraosseous hemophilic pseudotumor. The patient responded to conservative therapy of factor VIII replacement.