这个词是什么意思？
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)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D013281 · MeSH 2026。
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