Sialadenoid tumors of the respiratory tract: Radiologic-pathologic correlation

Most tracheobronchial sialadenoid tumors are found in an endotracheal or endobronchial location, whereas some myoepithelial tumors manifest as a peripheral nodule or consolidation. Findings suggestive of airway obstruction are seen frequently on CT scans of patients with tracheobronchial sialadenoid tumors. Adenoid cystic carcinoma shows infiltrative growth along the airway. Mucoepidermoid carcinomas are more commonly seen in the segmental bronchi, showing frequent tumoral calcification. Myoepithelial tumors show an infiltrative growth pattern with frequent distant metastasis.