Pulmonary carcinosarcoma is a rare malignant tumor which exhibits both epithelial and mesenchymal elements, and is identified by its histological and immunohistochemical characteristics.

• 摘要肺部癌肉瘤是罕见的肿瘤，并且同时包含了表皮和间叶细胞分化的恶化细胞，它以组织和免疫组织生化病理报告来诊断。