Inflammatory signs dominate the image, but here the light has been lost and the longitudinal folds meet giving this upper lobe a “funnel” aspect: “Bence sign”.
This indirect sign linked to bronchogenic carcinoma was described in Buenos Aires in 1942 by Dr. Alvaro Bence, in charge of the bronchoscopy service at the Guillermo Rawson hospital since 1938 and a disciple of Haslinguer in Vienna and of Chevalier Jackson in Philadelphia. (Fiorino, A. Historical evolution of bronchoscopy, Rev. Arg of tuberculosis, pulmonary diseases and public health 1987, 3:48)