102 
TUMOURS ON THE LOWER JAW. 
destroyed throughout its entire depth. In two months the tumour 
destroyed the central portion of the right branch of the lower maxilla, 
produced great disturbance, general decline, and death.” (“ Clinical 
Veterinary Medicine and Surgery,” p. 880.) Almost all the tumours in 
cattle described as sarcomata are in reality caused by actinomyces. As 
regards true tumours the prognosis is usually unfavourable, re-section of 
Fig. 60.—Cancer of the inferior maxilla. 
the jaw being the only reliable treatment. It is therefore almost always 
best to slaughter the animal. Keiper observed an osteo-sarcoma (?) in 
the horse, springing from the point of fracture of the lower jaw, 
between the incisors and pre-molars. This rapidly recurred after extir¬ 
pation, and in twenty-two days attained a height of six and a breadth of 
foui inches. Moller has several times removed similar growths, which 
have pioved to be my cofibromata. They usually appear on the buccal 
