[The silhouette sign].
D001984:Bronchial Neoplasms / Q000000981:diagnostic imaging*; D003560:Cysts / Q000000981:diagnostic imaging*; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D010496:Pericardium; D011014:Pneumonia / Q000000981:diagnostic imaging*; D013902:Radiography, Thoracic
Il silhouette sign.