Prevalence of Mucous Retention Cysts of Maxillary Sinus in Panoramic Radiography

Mucous retention cyst (MRC) of maxillary sinus is a kind of the mucus pseudocyst. It rarely causes any sign or symptom. The purpose of this study was to determine the prevalence and some associated risk factors of MRC. In this study، panoramic radiographs of 700 patients referring to oral and maxillofacial radiology department of dental school of Babol University of medical sciences were examined for one year and mucous retention cyst prevalence and some associated risk factors such as sex، site of occurrence، allergy، month and smoking habit were evaluated. The prevalence of this lesion was %7 (CI %95 5. 1-8. 9) and was significantly higher among men (p<0. 05). Also there was significantly correlation between seasonal allergy and smoking with MRC (p<0. 05) but there were no significantly correlation between month with MRC. The results of this study showed that the prevalence of MRC was more in men. Seasonal allergy and smoking also can cause MRC.