Large frontal osteoid osteoma with orbital extension

Area of Science:

• Orthopedic Oncology
• Neurosurgery
• Ophthalmology

Background:

• Osteoid osteomas are benign bone tumors typically found in long bones.
• Skull involvement is rare, accounting for less than 1% of benign osteoid osteoma cases.
• These tumors are characterized by a nidus of osteoid tissue surrounded by reactive bone.

Observation:

• A rare case of a large osteoid osteoma in the skull area is presented.
• The tumor's location led to the development of proptosis, an abnormal protrusion of the eyeball.
• Surgical intervention was necessary due to the tumor's size and symptoms.

Findings:

• The osteoid osteoma was successfully excised via a frontal sinusotomy approach.
• Histopathological examination confirmed the diagnosis of osteoid osteoma.
• Complete resolution of proptosis was achieved post-surgery.

Implications:

• This case expands the understanding of osteoid osteoma presentation and management in the craniofacial region.
• It underscores the importance of considering rare bone tumors in the differential diagnosis of proptosis.
• Surgical excision remains an effective treatment for symptomatic cranial osteoid osteomas.