Radiographic changes to mandibular canal in osteogenic sarcoma.

A 35year-old Chinese man came to the dental clinic with a painful, nonulcerative, and fast-growing swelling over the right mandibular body. Clinical examination revealed that the well-defined swelling was bony hard and tender, and measured about 3 X 3 cm. Panoramic (Fig. 1) and lateral oblique (Fig. 2) radiographs demonstrated an ill-defined radiopaque shadow extending from the apical area of the right mandibular third molar tooth, with resorption of the mesial root of the right mandibular first permanent molar tooth. Furthermore, in comparison with the left