A Rare Case of Pulmonary Epithelial-myoepithelial Carcinoma: Case Report and Literature Review

Background and objective Pulmonary epithelial-myoepithelial carcinoma is a very rare type of salivary gland lung tumor. No standard treatment plan yet. This article intends to analyze the clinical characteristics of pulmonary epithelial-myoepithelial carcinoma and discuss the diagnosis and treatment of pulmonary epithelial-myoepithelial carcinoma. Methods The clinical data of a patient with pulmonary epithelial-myoepithelial carcinoma were analyzed and other relevant clinical literatures were reviewed. Results Epithelial cells immunohistochemically expressed cytokeratin and myoepithelial cells immunohistochemically expressed SMA and S-100. The next-generation sequencing was mainly HRAS gene mutation and the express of PD-L1 protein was negative. Conclusion Most of the patients with Pulmonary epithelial-myoepithelial carcinoma have a good prognosis. Diagnosis mainly depends on microscopic examination and immunohistochemistry. The treatment of pulmonary epithelial-myoepithelial carcinoma is mainly surgical resection. The effect of radiotherapy and chemotherapy is not clear.