ALVEOLAR ADENOMA OF THE LUNG - FURTHER CHARACTERIZATION OF THIS UNCOMMON TUMOR

Alveolar adenoma of the lung is a poorly characterized, uncommon pulmo nary lesion with proliferation of alveolar epithelium and septal mesen chyme. We describe the electron microscopy, immunohistochemistry and D NA flow cytometry in a case of alveolar adenoma in a 55-year-old woman . Alveolar adenoma appears to be a distinct benign neoplasm of the alv eolar structures. Our findings further suggest that it is not a precur sor of bronchioloalveolar carcinoma or other type II pneumocyte lesion s of presumed malignant potential.