TECHNIQUE:  Routine cone beam computed tomography was performed from the mid orbits through the mandibular base.  Data was acquired as a volume acquisition and reconstructed in multiple planes.  No intravenous contrast was administered. Evaluation of soft tissues is somewhat limited by bone algorithm processing. 

Comparison:  None.

Findings: 

Airway:   There is scattered mucoperiosteal thickening of the bilateral maxillary sinus floors and right maxillary sinus roof. The osteomeatal units are widely patent. There is a hazy, ground glass attenuating osseous mass involving the anterior ethmoid air cells with broad base adherence to the lamina paprecea and fovea ethmoidalis. The remaining osseous structures are unremarkable. The airway is widely patent. 

Orbits:   Evaluation limited by technique, however, no gross abnormality noted. 

Oral Cavity:  Visualized mandible, maxilla and dental structures are within normal limits.  The soft tissues of the oral cavity are without radiographically evident abnormality. 

TMJ:  The osseous components of the temporomandibular joints are preserved. 

Other:  No abnormalities 

IMPRESSION:

1)   Fibrous dysplasia of the left anterior ethmoid air cells. Benign lesion. However, addition fibrous bone lesions may coexist. Recommend further evaluation by primary care physician

2)   Non specific maxillary sinus mucoperiosteal thickening may be a manifestation of acute or chronic inflammation.