A mastoid osteoma causing intracranial complications. A case report.

Area of Science:

• Neurosurgery
• Otolaryngology
• Pathology

Background:

• Osteomas are benign bone tumors, typically found in the craniofacial region.
• Paranasal osteomas are a common subtype, but mastoid sinus involvement is rare.
• Intracranial complications secondary to osteomas are infrequently reported.

Observation:

• A case of a mastoid sinus osteoma presenting with significant intracranial complications is described.
• The osteoma, belonging to the paranasal osteoma group, caused mass effect.
• Posterior fossa structures were displaced and compressed by the tumor.

Findings:

• This represents the first reported case of a mastoid osteoma leading to intracranial complications.
• The tumor's location within the mastoid sinus resulted in neurological compromise.
• Histopathological analysis confirmed the benign osteomatous nature of the lesion.

Implications:

• Highlights the potential for rare osteoma locations to cause severe neurological deficits.
• Emphasizes the importance of considering osteomas in the differential diagnosis of posterior fossa masses.
• Demonstrates the efficacy of a combined surgical approach for managing complex mastoid osteomas with intracranial extension.