Definition: A localized thickening of the maxillary sinus mucosa, often associated with areas of inflammation in the maxilla or of dental origin.
Radiographic Features:
- Location: Floor of maxillary sinus, adjacent to areas of inflammation
- Edge: Well-defined
- Shape: No particular shape (variable)
- Internal structure: Radiopaque
- Other: None specific
- Number: May be single or multiple, depending on surrounding bone and teeth
Key points:
- Not a true cyst (lacks epithelial lining)
- Often associated with dental pathology or sinus inflammation
- Typically dome-shaped on the sinus floor
- Usually asymptomatic
Clinical significance:
- Generally does not require treatment if asymptomatic
- May resolve spontaneously with treatment of underlying cause
- Can interfere with sinus lift procedures for dental implants
- Important to differentiate from other sinus pathologies
Note: Correlation with clinical findings and dental status of adjacent teeth is crucial for accurate diagnosis. Follow-up imaging may be necessary to monitor changes or resolution.