[3 cases of primary lung cancer with thin wall cavity].
D000231:Adenocarcinoma, Papillary / Q000000981:diagnostic imaging*; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging*; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011859:Radiography