Large frontal osteoid osteoma with orbital extension.

Osteoid osteomas are benign bone tumors first described by Jaffe in 1935. They are usually located within the cortex of long bones in the lower extremities. These types of tumors are rare in the skull area, representing less than 1% of benign cases.

Orbital subperiosteal hemorrhage while scuba diving.

Purpose: To report an uncommon case of unilateral subperiosteal hemorrhage while scuba diving involving the orbit, a condition characterized by proptosis and associated severe ocular motility disturbances with displacement of the eyeball.

Material And Methods: Observational case report.

Results: Unilateral subperiosteal hemorrhage in a 31-year-old woman while scuba diving at a depth of 20 meters.