Nasopalatine duct cyst.

The nasopalatine duct cyst appears to be an aggressive and symptomatic condition in the South African black population group. Of a total of 114 cases, 30 patients, all blacks, had cysts in excess of 30 mm in diameter. Two patients with large nasopalatine duct cysts, one of which was infected, underwent computed tomography. Computed tomography is an excellent method of demonstrating the extent, bony destruction and relationship of the lesion to neighbouring structures. A review of the subject with clinical and radiological features is presented.