[2 unusual cases of primary lung cancer. I. A diagnostically difficult case simulating idiopathic interstitital fibrosis with vanishing tumor in x-ray image].
D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging*; D011859:Radiography