564 



PRINCIPLES OF VETERINARY SURGERY 



In the schools of Berlin, Munich and Dresden during 

 seven years, there v\^ere found out of: 



86,113 horses 1,113 cases of tumors. 

 85,337 dogs 4,020 cases of tumors. 

 4,972 bovids 1,020 cases of tumors. 

 Out of 643 tumors in the dog, Frohner found 47 per 

 cent of them malignant; out of 47 tumors of the horse 34 

 per cent; and out of 75 cases in the ox 29 per cent were 

 malignant. The same writer publishes more recent statis- 

 tics as follows : 



Sarcomata 28 per cent. 



Fibromata 15 per cent. 



Carcinomata 10 per cent. 



Adenofibromata 4 per cent. 



Lipomata 2 per cent. 



Osteomata 2 per cent. 



In Frohner's list, the botryomycostic tumors, keloids, 

 papillomata, and keratophyllocele which he places in the 

 category of neoplasms have been omitted. 



CLASSIFICATION. 



I. Tumors of the epithelial type. 



(a) Adenoma. 



(b) Epithelioma. 



(c) Carcinoma. 



