A discussion such as this illustrates what has been accomplished in team work in the handling of the problem of bronchial neoplasm. To give honor where it is due, the worker in internal medicine must acknowledge his debt to bronchoscopy in diagnosis and to roentgenology in therapy. Some day we hope to be able to owe as much to surgery.
There are many obscure factors in the problem of bronchial new growths. In the first place, are they increasing in frequency, or is there only more frequent recognition of their existence? One can interpret the statistics as one pleases and come to different conclusions. To me it seems difficult to avoid the conclusion that they are on the increase. Careful studies of physical signs and thorough autopsies are not matters of recent years only. It may be that more of these problems are brought to us for study and, therefore,