Although we have no inconsiderable number of articles in the literature bearing on the relation of trauma to tumor formation, a common defect is that the amount of material on which conclusions are based is not sufficiently large to give valuable results. With the enormous material of Vienna at his disposal, however, Haberfeld1 has been able to examine a sufficient number of cases of cancer to entitle his figures to respectful consideration. His investigations concern only the cases of carcinoma of the stomach, the gall tracts and the lungs, and, in his opinion, the results are emphatically in support of the view that, at least in these three organs, chronic trauma is a most important predisposing cause of cancer.
Since Rokitansky first directed attention to the relation of gastric ulcer to gastric cancer, both clinicians and pathologists have given this subject much consideration, and, while clinical experience has spoken