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Retention cysts of the maxillary sinus

Retention cysts of the maxillary sinuses are usually discovered incidentally on a plain sinus radiograph, or cross-sectional imaging of the head. They do not usually cause symptoms. 

Radiographic features

They are slow growing lesions, but mucosal and cortical integrity is preserved. 

Plain film

On radiographs, they are radiopaque, dome-shaped structures with a rounded edge, located on the floor of the maxillary sinus.

Treatment and management

They should be followed up clinically and by radiographic examination. Mostly no treatment is indicated, because of their high spontaneous regression rate 1,2.

See also

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