A note on the roentgen features of bronchial adenoma of the peripheral type.

Bronchial adenoma is a neoplasm which is generally considered to be benign, but may on occasion present malignant features. It represents from 6 to 10 per cent of all primary lung neoplasms. In contrast to carcinoma of the lung, adenoma is of equal incidence in both sexes. In a series of 86 cases reported by Moersch and McDonald (1), 45 occurred in men and 41 in women. Almost 90 per cent of the patients were less than fifty years of age. The clinical picture is dependent upon the location of the adenoma. Cough is a common symptom. Because of the vascularity of the neoplasm, hemoptysis is frequent. If obstruction to a pulmonary segment occurs, the symptoms are those of associated recurrent pneumonitis and bronchiectasis. Pathology Topographically, bronchial adenomas may be either central or peripheral. They are thought to arise in the mucous glands (2), and this origin helps to explain their relatively frequent occurrence in the main order bronchi, in which such glands are abundant. Occasionally an adenoma...