fig18

Figure 18. Ameloblastoma. (A) Coronal non-contrast CT image, (B) Coronal T2-weighted MRI, and (C) coronal post-contrast T1-weighted MRI show an expansile cystic mass (arrow, B) involving the left maxillary alveolus and extending into the left maxillary sinus. Avid enhancement of the internal solid component (arrow, C) is evident on the post-contrast MRI. The lesion is also associated with an unerupted tooth (arrow, A). CT: Computed tomography; MRI: magnetic resonance imaging.