Paranasal sinuses retention cysts

Retention cysts of paranasal 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 radiograph

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

Treatment and management

Mostly no treatment is indicated, because of their high spontaneous regression rate 1,2.

Differential diagnosis

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Article information

rID: 22374
System: Head & Neck
Section: Pathology
Tags: refs, stub
Synonyms or Alternate Spellings:
  • Maxillary sinus mucous retention cyst
  • Maxillary sinus mucous retention cysts
  • Retention cyst of the maxillary sinus

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