502 PRINCIPLES OF VETERINARY SURGERY 



tice. It is, at least, only brought to the notice of the prac- 

 titioner when already well developed. The following symp- 

 toms are usually observed: One of the branches af the jaw is 

 deformed, bent round; sometimes the deformity is diffuse; 

 at other times it has clearly defined limits. When the lesion 

 begins it is nearly always diffuse, that is to say, concealed by 

 a more or less pronounced oedema that occupies the peri- 

 phery and fills the cavity between the jaws. In time, the 

 oedema is reabsorbed as the tumor becomes more pro- 

 nounced. Its relief is exposed more and more by the sinking 

 of the peripheric zone. The tumor, which varies greatly in 



Fig. 52. 

 Antinomycostic Tumor of the Inferior Maxillary (Le Blanc). 



size, is now found to be hard and of a fibrous or cartilaginous 

 consistency. It is very adhesive to the deep tissues and is 

 covered over with skin that is nearly always intact at the be- 

 ginning but clings strongly to the neoplasm. 



If this tumor is allowed to run its course it generally in--, 

 vades more surface, sometimes it increases in thickness. It 

 undergoes an important phenomenon : it is softened at many 

 localized points and exhibits fluctuating zones corresponding 

 to small abscesses which end by bursting at the surface and 

 leaving fistulse behind them. The osseous neoplasm covered 

 over with a normal skin at the beginning now becomes a 

 fistulous tumor. 



