Papillary Neoplasms of the Bronchus of Low-grade Malignancy

In this paper we describe eight examples of papillary neoplasms of the bronchus in which atypical cytological features were present. In seven the lesion was localized and invasion was not pre- sent, in one extensive spread within the bronchial tree of a lobe had occurred but invasion into the lung parenchyma was doubtful. Lesions of this type receive little comment in the literature although they can be perplexing in diagnosis and management. Typical benign papillomas of the bronchus are also rare, and one is briefly described for comparison. CASE REPORTS CASE I This man was a physician, aged 50. a non- smoker except for occasional cigars. Although a mild diabetic, he had been in good health until June, 1959, when a febrile illness occurred. At this time a radio- graph of the chest showed a shadow in the right lower lobe which was thought to be a collapse in the posterior basal segment. At bronchoscopy on 4 July 1959 the larynx. trachea.