[Fibrebronchoscopic observation on 21 cases of middle lobe lesion].
D000328:Adult; D000368:Aged; D001706:Biopsy; D001999:Bronchoscopy; D005260:Female; D006801:Humans; D008168:Lung / Q000473:pathology; D008297:Male; D008875:Middle Aged; D008878:Middle Lobe Syndrome / Q000473:pathology*