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Figure 4: Axial MRI images at the level of the mandible demonstrating abnormal bone marrow infiltrative process replacing the normal bone signal on both T2-weighted images (a) and T1-weighted images (b) with diffuse enhancement on the contrast-enhanced axial T1-weighted images (c) (short arrows). There were no pathologic fractures and no soft tissue masses. Coronal T2-weighted images (d), unenhanced T1-weighted images (e), and contrast-enhanced T1-weighted images (f), showing abnormal thickening and enhancement of the mental nerves as they exit the mental foramen bilaterally (long arrows).