Asymptomatic, ill-defined radiolucent area in the posterior body of the mandible.

The focal osteoporotic bone marrow defect is seldom considered preoperatively when a differential diagnosis is considered for focal, ill-defined radiolucent areas of the jaws. Clinicians should be aware of the existence of this abnormality and understand that it appears radiographically similar to other lesions, some of which are malignant; therefore a biopsy is necessary to establish a diagnosis.