ABSTRACT
Those patients who have an endobronchial mass on endoscopy may have a benign lesion or a malignant lesion. Of the malignant lesions, this can be low grade malignant lesions, one of the more common malignant lesions, or a rare malignant lesion. Benign lesions include such things a plasma cell granuloma (in flammatory pseudotumor). This is a benign tumor that is a post-inflammatory reaction and not a true neoplasia. Other lesions include granular cell myoblastomas or granular cell tumors. These originate from Schwann cells and are usually found in larger bronchial origins although they may occur as a peripheral lesion. Lei omyoma, lipoma and fibroma are other benign mesenchymal tumors. The more common malignant tumors include large cell carcinoma, adenocarcinoma, small cell and squamous cell carcinoma. Bronchoalveolar carcinoma can be considered a subset of adenocarcinoma.
