[Pure bronchial adenoma. Anatomico-clinical and ultrastructural study of a case].

We report a case of monomorphic bronchial cystadenoma (or mucous gland adenoma). This exceptional tumor (only 34 cases reported up to now) is benign, but a lobectomy is often necessary because of severe inflammatory lesions of the surrounding lung. Ultrastructurally it was different from the other tumors of bronchial glands, since it contained mucous cells, myoepithelial cells, and oncocytic cells, and the basement membrane was thickened.