Necrotizing sialometaplasia.

Necrotizing sialometaplasia is a benign inflammatory disease of salivary gland origin. Because of its clinical and histologic resemblance to squamous cell carcinoma, this disease must be recognized. The cause is unknown, but it may be related to oral trauma, tobacco use or inadequate blood supply. The lesion heals spontaneously, regardless of therapy, in two to eight weeks.