A case of epithelial–myoepithelial carcinoma of the bronchus – A review of reported cases and a comparison with other salivary gland-type carcinomas of the bronchus

We present a case of a polypoid tumor located in the right middle lobe bronchus. The tumor was composed of bi-layered glandular or ductular structures consisting of inner cuboidal cells and outer multipolar cells. Immunohistochemical examinations confirmed epithelial and myoepithelial differentiation in the inner and outer components, respectively. Consequently, the tumor was diagnosed as an epithelial–myoepithelial carcinoma. Epithelial–myoepithelial carcinomas of the bronchus are very rare neoplasms with low-grade malignant potential. To date, including our case, only 27 cases have been reported in the English literature. Here, we review the reported cases and compare them with other salivary gland-type carcinomas regarding clinical, biological, and genetic features.