Fig. 2. Cone-beam computed tomography scans reveal well-defined radiopaque masses surrounded by radiolucent rims in the periapical regions of the left mandibular second premolar and first molar (A–C) and the right mandibular first and second molar (D–F). All the lesions were separated from the adjacent teeth by a radiolucent line. Invasion of the cortical bone can be observed (arrows). (A and D: sagittal, B and E: frontal, C and F: axial scan).