Four cases of pleomorphic adenoma of the cheek and the upper lip.

Pleomorphic adenoma is the most common tumor in all salivary glands. It affectsat the parotid gland in the major salivary gland or palatal mucosa in the minor salivarygland, but it seems to be rare in the cheek, lip, and tongue.Recently we have experienced four cases of pleomorphic adenoma of the cheek and theupper lip, and reported that outline as follows:1. At the cheek was one case (44-year-old female), at the upper lip were three cases (23-year-old male, 42-year-old female, 74-year-old female).2. In all cases, the tumor was covered with fibrous capsula, and clearly separated fromthe marginal tissues, so we have enucleated the tumors.3. We thought that echography, CT, xeroradiography was more useful for the tumorsize, the relation to marginal tissues, the diagnosis of quality and inner structure of the tumorin pleomorphic adenoma of the cheek.4. During the observation ranging from six months to three years and nine months, therewas no recurrence and the prognosis was good for all cases.