Monostotic Fibrous Dysplasia of the Maxillary Sinus-A Case Report

Background: Fibrous dysplasia is a benign expansive but slowly progressive bone disorder with unknown origin. It may be monostotic or poliostotic.

Aim: To present a rare case of monostotic fibrous dysplasia of the maxillary sinus.

Materials and Methods: A 65-year-old male patient presented to our department with symptoms of chronic rhinosinusitis. The occipitomental x-ray showed opacification and cortical thickening of the maxillary sinus.

Results: The differential diagnosis included all inflammatory disorders and malignancies of the maxillary sinus. CT revealed typical ground glass appearance which is characteristic of fibrous dysplasia. Indications for treatment are marked deformity or functional disturbances. These were absent in the present case and therefore conservative management was decided upon.

Conclusions: Although monostotic fibrous dysplasia of the paranasal sinuses is rare, it should be included in the differential diagnosis of all paranasal lesions. Because of its benign nature and typical slow growth, surgical treatment should be reserved for patients with functional or cosmetic problems.