Stomatitis [Disease/Finding] Stomatitis, Aphthous [Disease/Finding] N0000002833 C0038363 D013281 321258009 Ulcer, Aphthous A recurrent disease of the oral mucosa of unknown etiology. It is characterized by small white ulcerative lesions, single or multiple, round or oval. Two to eight crops of lesions occur per year, lasting for 7 to 14 days and then heal without scarring. (From Jablonski's Dictionary of Dentistry, 1992, p742) Stomatitis, Aphthous 1023942 M0020551 Stomatitis, Aphthous Canker Sore C5844 Aphthae