Two cases of minute lung cancer apparently developing on the basis of chronic bronchitis.
D001991:Bronchitis / Q000150:complications* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000209:etiology; D002908:Chronic Disease; D006801:Humans; D008168:Lung / Q000473:pathology; D008175:Lung Neoplasms / Q000209:etiology* / Q000473:pathology; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D014397:Tuberculosis, Pulmonary / Q000150:complications