Differential diagnosis for thoracic MTs. A, Endobronchial pleomorphic adenoma with squamous component; B, pulmonary epithelial-myoepithelial carcinoma with bi-layered duct like structures; C, pleomorphic carcinoma with adenocarcinoma and malignant myoepithelial component; D, schwannoma of chest wall with myxoid matrix; E, primary pulmonary myxoid sarcoma; F, metastatic melanoma with myxoid stroma; G, metastatic matrix producing carcinoma of the breast; H, metastatic ossifying fibromyxoid tumor.