Bilateral Mucous Retention Cysts:
A Case Report and Overview
Sirilawan Tohnak DDS, MEng, PhD*1, Pichit Ngamwannagul DDS*2, Saran Worasakwutiphong MD*3,
La-or Chompuk MD*4, Temphon Kruamak MD*5
Affiliation :
*1 Department of Oral Diagnosis, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
*2 Department of Oral Surgery, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
*3 Department of Surgery, Faculty of Medicine, Naresuan University, Phitsanulok, Thailand
*4 Department of Pathology, Faculty of Medicine, Naresuan University, Phitsanulok, Thailand
*5 Department of Radiology, Faculty of Medicine, Naresuan University, Phitsanulok, Thailand
Background : The mucous retention cyst of maxillary sinus results from either a pathologic secretory duct blockage or a
cystic degeneration. Most of them develop unilaterally, but may occur bilaterally. Retention cysts requires no treatment. In
symptomatic lesions, however, it must be removed by surgical treatment.
Objective : To report a clinical case of large bilateral retention cysts accidentally found in a young male patient treated by
total enucleation.
Case Report : The authors reported on a young male patient of mucous retention cysts in left and right maxillary sinuses.
Results : Panoramic radiograph, postero-anterior skull projection, lateral cephalometric radiograph, and computed
tomography (CT) showed the typical radiographic features of mucous retention cysts. All specimens illustrated the
histopathologic features of sinus lining overlying edematous connective tissue.
Conclusion : Although retention cysts appear on routine radiograph examinations, CT is an alternative modality to assist
in pathology differentiation. The lesion is commonly asymptomatic, however, they should be noticed and monitored to avoid
complications.
Keywords : Mucous retention cyst, Retention pseudocyst, Maxillary sinus
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