MALIGNANT TUMOURS IN ANIMALS. 



583 



which explains the opinion still held that sarcoma is more frequent 

 than carcinoma. 



Thus Semmer, after examining fifty-seven malignant tumours, 

 which he had collected, found thirty-two sarcomatous and twenty-five 

 carcinomatous. In a special report he related fifty-six new cases of 

 sarcoma. In the table printed below we have compared Semmer's 

 figures with our own. It will be noted how widely our results differ 

 from his. 



According to our researches, chiefly on the dog, epithelioma is 

 much commoner than sarcoma. The opposite opinion is probably 

 due to the mistakes so often made between sarcoma and tuberculosis.* 



The figures showing the frequency of tumours in animals treated 

 at the Berlin, Munich, and Dresden schools, for an average period of 

 seven years, are as follows : — 



Of 86,113 diseased horses, 1113 suffered from tumours = i"3 per cent. 

 Of 85,537 diseased dogs, 4020 ,, ,, ,, = 47 >» 



Of 4972 diseased oxen, 102 ,, ,, ,, =2 ,, 



Frohner determined the nature of 643 tumours removed from dogs 

 in the chnique for small animals at the Berlin school. He found : 306 

 malignant tumours {i, e. about 47 per cent.) ; 262 epitheliomata (40 per 

 cent.) ; and 44 sarcomata (7 per cent.). Of 47 new growths removed 

 from the horse, 16 were malignant (34 per cent.) ; 10 sarcomata (21 

 per cent.) ; and 3 epitheliomata (6 per cent.). Of 75 new growths from 

 oxen, the histological examination of which was carried out by 



* In his Pathologie der Geschwiilste bei Thieren, Caspar has collected interesting statistics 

 regarding tumours in animals from the reports made by the professors of clinical medicine 

 and pathological anatomy in the German veterinary schools. 



