Seven cases of epithelial-myoepithelial carcinoma of the parotid gland are reported. Immunohistochemical evidence for the dual (glandular secretory and myoepithelial) differentiation of the cells composing these lesions is presented. Three of the cases recurred locally and two gave rise to metastases. The biologic behavior does not appear to be correlated with the histologic features that constitute the morphologic spectrum of epithelial-myoepithelial carcinoma.
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Collina et al. (1991) studied this question.
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