[Necrotizing sialometaplasia].
Necrotizing sialometaplasia is a non-neoplastic self-limiting inflammatory-ulcerous condition of the minor salivary glands. It is reported to appear in the oral cavity at every area where minor salivary glands exist, particularly those of the palate. Necrotizing sialometaplasia is a very rare disease that spontaneously develops with fearsome features. It is thought to be due to infarction of minor salivary glands, and heals in a few weeks, without any treatment. The clinical and histopathological features of necrotizing sialometaplasia often simulate those of such malignancies as squamosus cell carcinoma or mucoepidermoid carcinoma. Familiarity with necrotizing sialometaplasia and correct differential diagnosis are paramount in avoiding misdiagnosis and inappropriate treatment.