352 



TUMOURS ON THE LOWER JAW. 



tumours in cattle described as sarcomata are in reality caused by 

 actinomyces. As regards true tumours the prognosis is usually 

 unfavourable, re-section of 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 



Fig. 328. — Cancer of the inferior maxilla. 



of fracture of the lower jaw, between the incisors and pre-molars. 

 This rapidly recurred after extirpation, and in twenty-two days 

 attained a height of six and a breadth of four inches. Moller has 

 several times removed similar growths, which have proved to be 

 mycofibromata (botryomycomata). They usually appear on the 

 buccal membrane, and possessing a narrow base are easily extirpated. 

 They must not be mistaken for those new growths which arise from 



