Abstract
The mucosal retention cyst of the maxillary sinus is a pathologic cavity filled with mucus. Clinically, the retention cyst is asymptomatic, and when symptomatic may come along with headache and facial neuralgia. A 49-year-old patient sought the University Dentistry Department. The patient presented facial asymmetry; on intraoral examination, we found an expansive lesion in the fundus of the right maxilla, located in the region between dental units 14 and 17. Slow progression, painful symptoms, and discomfort when placing the prosthesis. The tomography revealed a hyperdense image inside the right maxillary sinus. The patient underwent an incisional biopsy and the histopathological diagnosis was of mucous retention cyst. The lesion was marsupialized for 9 months and was subsequently submitted to surgical enucleation of the lesion, followed by curettage of the bone wrapper. The patient progressed well and presents herself in follow-up.
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