Abstract
An evaluation of bronchial biopsy and the study of bronchial secretion for tumor cells as an aid in the diagnosis of bronchogenic carcinoma have been made in the Thoracic Surgery Department of the Hines Veterans Administration Hospital. In comparing the relative results of each of these two means of establishing a positive diagnosis, we have made three distinct study groups of 108 proved cases of bronchogenic carcinoma. The cases do not necessarily represent distinct and separate cases of bronchogenic carcinoma, as many overlap into one or the other of these three study groups. Mention should be made that all bronchoscopies and techniques were done or directly supervised by men fully experienced in the normal and abnormal findings within the tracheobronchial tree. In two and one-half years, a total of 859 consecutive bronchoscopies were performed for diagnostic reasons (Table 1). There were 108 cases of bronchogenic carcinoma. Woolner reported 588 diagnostic
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