The Case of a Subtle Expansion of the Mandible

mandibular expansion
The following Case Challenge is provided in conjunction with the American Academy of Oral and Maxillofacial Pathology.

A healthy 25-year old Caucasian man presented for a routine dental examination. He was unaware of a subtle expansion involving the right posterior mandible, which was bony hard and nontender.  Radiographic findings prompted an immediate referral of the patient to an oral and maxillofacial surgeon for diagnosis and management of the jaw lesion.

After you have finished reviewing the available diagnostic information, make the diagnosis.