The evaluation of cytology in the early diagnosis of pulmonary carcinoma.
D000368:Aged; D001706:Biopsy; D001999:Bronchoscopy; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000473:pathology; D003581:Cytodiagnosis; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D013183:Sputum / Q000166:cytology; D013997:Time Factors