Spontaneous subperiosteal orbital hemorrhage.

Subperiosteal orbital hemorrhage typically results from trauma. Spontaneous subperiosteal orbital hemorrhage (SSOH) is rare and has been reported with sudden elevation of cranial venous pressure, bleeding diathesis, and sinusitis. This article presents a series of 9 patients (11 orbits) with SSOH and review the associated systemic conditions. 10 out of 11 orbits (91%) underwent surgical intervention due to advanced orbital signs or poor vision.