TUMORS ENCOUNTERED IN VETERINARY PRACTICE. 
5S9 
more of the benign variety which differ markedly in respect to 
prognosis and treatment, it is of prime importance to be able to 
distinguish one form of tumor from another. Laboratory diag¬ 
nosis is available only to those who are equipped and that only 
after operative removal of all or a part of the tumor has taken 
place. 
In making a clinical diagnosis there are various valuable 
guides. First of all the location of the tumor is important. The 
eye, the penis and the mammary glands are most frequently af¬ 
fected with carcinomata, sarcomata and adenomata. From the 
above mentioned, eight of the tumors affected the eye, and of 
these four were carcinomas, and two sarcomas. The bones are 
most frequently affected with osteomata or sarcomata. In our 
experience all of the tumors affecting the bone have been osteo¬ 
mata. One appeared as smooth, rounded, the size of a goose egg 
outgrowth from the lower mandible, covered by the mucous 
membrane beneath the tongue. They commonly appear as pedun¬ 
culated tumors from the lower border of the mandible. The skin 
and the mucous membrane of the nostril is the most common 
location for papillomata. Our clinic shows that fully half of all 
tumors encountered are of this variety. Occurring upon the skin, 
they may be found in most any region of the body. They may 
appear either as the organic greyish warts or verruca so common 
in calves, or as the soft vascular, cauliflower-like growths so com- 
monlv found in the skin of colts. 
J • 
The papiloma of the mucous membrane appears as a spread¬ 
ing tumor from the mucous membrane of the usual passages, 
especially in young animals. They are flat upon the surface and 
elongated in the direction of the head. Their attachment is 
usually small and osseous in nature. Out of seventy-four tumors 
two have been of this variety. Both occurred in two-year-old 
colts. The subcutis is a common seat for the fibroma, lipoma and 
melaus sarcoma. 
Again the size and rapidity of development are also important 
in making a differential diagnosis. Malignant tumors, especially 
sarcomata, are very rapid in growth; fibromata and lipomata 
