Diagnostic criteria of MR imaging and CT in evaluating tumor invasion into the mandible
| Mandibular cortical invasion |
| MRI, CT: Defect of the cortical bone adjacent to the tumor mass |
| Bone marrow involvement |
| MRI: Abnormal signal intensity of bone marrow* contiguous to the cortical defect |
| CT: Trabecular disruption contiguous to the cortical defect |
| Inferior alveolar canal involvement |
| MRI, CT: Bone marrow involvement reaching the inferior alveolar canal |
* Hypointense on T1-weighted and hyperintense on fat-suppressed T2-weighted image, with enhancement after contrast administration.