Clinical and Radiographic Findings

The patient presented with progressively growing gingival swelling of the right posterior maxilla. It was first thought to be an infection where antibiotics were prescribed to no avail. The lesion continued to grow and the radiographic findings were those of a diffuse radiopaque lesion (Figure 1). Head/Neck CT scan demonstrated an expansile soft tissue mass centered in the right maxillary sinus that extended posteriorly through the wall of the sinus as well as anteriorly to the maxillary sinus and to the deep soft tissue of the buccal mucosa. The lesion extended superiorly to the level of the orbital floor but did not appear to be penetrating it.

Figure 1 This is a periapical radiograph composite, all demonstrating diffuse radiopaque lesion of the alveolar bone in area of teeth #s 1-4.