Surgical approach to an oronasal fistula of 40 years' duration.
D006801:Humans; D008297:Male; D008439:Maxillary Diseases / Q000150:complications; D008875:Middle Aged; D009957:Oroantral Fistula / Q000209:etiology / Q000601:surgery*; D010159:Palate; D013587:Syphilis / Q000150:complications