Radiographic appearance of fibrous dysplasia associated with the maxillary sinus

Fibrous dysplasia is a relatively rare tumorous lesion in the maxillofacial region. The radiographic appearance of this lesion varies widely in the jaw. Generally, the occurrence rate is higher in the maxilla than in the mandible. The purpose of this study was to report six cases of fibrous dysplasia associated with the maxillary sinus. In this study, we examined radiographic patterns which demonstrated the lesion's affect on the sinus radiographically. Mixed radiopacity and radiolucency (the so-called ground glass appearance) was also seen in each of these cases. In four cases in which CT images were obtained, the lesion showed buccal expansion and infiltration into the maxillary sinus.