RESUMO
Nasopalatine duct cysts are the most common nonodontogenic developmental cyst originating in the incisive canal of maxilla and occuring in approximately 1% of the population. Clinical presentation is asymptomatic in small cysts, but shows swelling, pain and drainage from the hard palate in large cysts. The definite diagnosis should be based on clinical, radiological and histopathologic findings. The treatment of nasopalatine duct cysts consists of an enucleation of the cystic tissue, only in rare cases a marsupialization needs to be performed. We report a case of infected nasopalatine duct cyst in a 65-year-old man. He complained of painful swelling in the midline and nasolabial area. Physical examination revealed a huge tender mass in the midline of upper jaw. Diagnosis was suggested on the basis of computed tomography. Under the general anethesia, an enucleation was performed via sublabial approach.