Necrotizing sialometaplasia: a diagnostic dilemma.
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CT of the salivary glands can produce clinically significant information that may help in the selection of appropriate therapy. It is the method of choice for the examination of mass lesions in and about the salivary glands. The role of CT for the evaluation of calculi and other obstructions and sialectasis is not yet determined. Conventional sialography may still be the method of choice for these entities.
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Necrotizing sialometaplasia is a benign, ulcerative, inflammatory process of the minor salivary glands, primarily found in the hard palate. It is often mistaken clinically and histologically for a malignant tumor (that is, mucoepidermoid or squamous cell carcinoma). The lesion heals spontaneously in six to 12 weeks. It occurs primarily in persons between the ages of 40 and 60 and has been reported more frequently in men than women. In necrotizing sialometaplasia the squamous metaplasia and tissue necrosis is confined to the existing ductal and lobular pattern of the salivary glands, a unique characteristic that aids in diagnosis. Five additional cases are presented.
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