386 SURGERY 



tti at the facts are not such that a satisfactory explanation can only be obtained 

 by the assumption of a parasitic influence, but that we are quite able to explain 

 all the phenomena in the morphology and histology of cancer without parasites. 

 I come thus to the following conclusions in regard to the question of the para- 

 sitic origin of cancer: 



(1) No one has at the present day brought proof that cancer has a parasitic 

 origin. 



(2) There is no necessity of assuming a parasitic etiology for cancer. 



DR. CARL PFISTER, of New York City, presented a paper containing a summary 

 of the treatment of three hundred cases for hernia. 



