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Seven hundred consecutive bronchoscopies were analyzed for evidence of lymph node perforation into the bronchial tree without finding a single case with the pathognomonic appearance. Lesions suggestive of perforation were seen in seven cases and eight presented characteristic scars. Additional clinical and roentgenologic data corroborated the diagnosis in these 15 cases.
Pathologic openings in the bronchial mucosa were found with about the same frequency as in other institutions (8 per cent). Bronchoscopic, roentgenologic and anatomic features of these lesions are reviewed and described and their pathogenesis is discussed.
The difficulties in the interpretation of the bronchoscopic appearances of fistulous tracts due to lymph node perforation and diseased excretory ducts of mucous glands are noted.
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