Meningioma Extracranial Primary Bone Temporal—Case Report

Introduction: Among brain tumors, meningioma is the most common, accounting for 15 to 20% of intracranial neoplasms. However, the primary extracranial meningioma of the temporal bone is rare (about 1% of cases), being limited to a few case reports in the literature and few revisions. Clinical and radiographic findings are nonspecific, requiring histopathologic evaluation to confirm.

Objective: Report a case of primary meningioma of the temporal bone.

Resumed report: Subject was 51 years old, had history of progressive hearing loss, and tinnitus in the left ear about seven years. Two months ago started generalized tonic-clonic seizures treated with carbamazepine. This was followed by keeping in another service and being subjected to the tympanic paracentesis with placement of tympanostomy tubes without clinical improvement.

Physical examination: Bulging left tympanic membrane in posterior inferior quadrant, with loss of gloss and transparency. CT and MRI noticed lytic lesion with involvement of the temporal bone on the left and in the middle dural reaction. Bone and whole body gallium scintigraphy showed osteoblastic lesion in the left temporal bone without associated lesions and negative for other infectious process. Submitted to mastoidectomy confirmed meningioma pathologic. One month postoperatively patient is asymptomatic.

Conclusion: Meningioma arising from the temporal bone has rare lesions. The symptoms are nonspecific, with tinnitus, progressive hearing loss, headache, ear discharge, and otorrhagia. Surgery is the treatment of choice, removal of the tumor with mastoidectomy, although the recurrence rate varies from 7 to 84%.