Exophthalmos and hemiheadache caused by osteoma in the greater wing of sphenoid bone: an extremely rare case report.

Abstract

A 53-year-old woman complained of hemiheadache, exophthalmos in the right eye, and limitation in lateral eye movements progressing to diplopia in the past 2 months. The physical examination of the rest systems was unremarkable. The radiological investigations revealed a hyperdense lesion arising from the right greater wing of the sphenoid bone and compressed on the orbit's components and eye muscles, which caused proptosis. The radiological findings suggested osteoma and the tumor was excised by craniotomy. The patient gets rid of the symptoms and the follow-up for 6 months was uneventful. Even hemiheadache, exophthalmos, limitation in eye movements, and diplopia are unfamiliar findings in osteoma, they may be its manifestations. Also, MRI is used as a diagnostic method with computed tomography scan in intracranial osteoma. These cases are treated by craniotomy. Even though osteoma is a benign tumor, it may form in unusual locations and cause unexpected symptoms. So, it should be a differential diagnosis in skull bony tumors. Also, it should be treated when exists in sensitive places to avoid irreversible outcomes.