Salivary gland-type mixed tumor (pleomorphic adenoma) of the lung.

Primary pleomorphic adenomas of the respiratory tract are rare tumors. They usually originate from the bronchial glands, but may also be unrelated to the bronchial tract and be localized in the pulmonary parenchyma. These salivary-gland type neoplasms have peculiar histological and clinical features: they usually behave as low-grade malignant neoplasms, but may also have more aggressive features. The diagnostic and therapeutic approach in a patient with a pulmonary pleomorphic adenoma is described.