23 year-old with left jaw pain




           
Panorex                                                                                              



CT axial noncontrast bone windows



CT axial noncontrast soft tissue windows



CT coronal noncontrast bone windows


Findings:

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

DDX:

osteoid osteoma, osteoblastoma



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.



Submitted by Hari Challa, MD, UW Neuroradiology Fellow

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