23 year-old with left jaw pain

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Findings:

Diffuse sclerotic lesion of the body of left mandible with 5 mm nidus surrounded by lucent halo

DDX:

osteoid osteoma, osteoblastoma

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Diagnosis:

Osteoblastoma of mandible

Discussion:

Osteoblastoma is a benign bone tumor accounting for 1% of all bone tumors; it commonly involves the spine and the sacrum of young individuals, with less than 5% being localized to the posterior mandible. Radiologically, they are usually poorly defined, radiolucent/radiopaque lesions containing calcifications and not showing sclerotic borders or periosteal reactions.

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Submitted by Hari Challa, MD, UW Neuroradiology Fellow