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.
They are slow growing lesions, but mucosal and cortical integrity is preserved.
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.
- sinonsal polyp
- may be indistinguishable
- paranasal sinus mucocoele
- 1. Wang JH, Jang YJ, Lee BJ. Natural course of retention cysts of the maxillary sinus: long-term follow-up results. Laryngoscope. 2007;117 (2): 341-4. Laryngoscope (full text) - doi:10.1097/01.mlg.0000250777.52882.7a - Pubmed citation
- 2. Donizeth-Rodrigues C, Fonseca-Da Silveira M, GonçAlves-De Alencar AH et-al. Three-dimensional images contribute to the diagnosis of mucous retention cyst in maxillary sinus. Med Oral Patol Oral Cir Bucal.;18 (1): e151-7. Free text at pubmed - Pubmed citation