Epithelial-myoepithelial carcinoma of the minor salivary glands: a case report and review of the literature.
General dentistry(2016)
Abstract
Epithelial-myoepithelial carcinoma (EMC) is a rare tumor, especially in the minor salivary glands. This case report describes a 40-year-old man who presented with an EMC on the palate. Histologically, the tumor was characterized by a biphasic structure consisting of duct-lining cuboidal cells in the inner layer and clear myoepithelial cells in the outer layer. The clear cells predominated, and the diagnosis was confirmed with immunohistochemical staining. The inner cuboidal epithelial cells were positive for cytokeratins, whereas the outer cells were positive for S-100 protein and smooth muscle actin. The patient was treated with a wide surgical excision, and no recurrence or metastasis was observed at a 10-year follow-up. A literature review found only 30 well-documented cases of EMC in the intraoral minor salivary glands.
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Key words
minor salivary glands,epithelial-myoepithelial
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