468 VETERINARY SURGICAL THERAPEUTICS. | 
the thick coat of tissues, rebel to the inflammation, which covers them; 
and besides that, for certain ringbones as for some spavins, the im- 
mediate neighborhood of the articulations is one of the most important 
circumstances which make us reject the idea of the application of peri- 
ostotomy, as being at least useless and certainly dangerous.” We will 
see that there is indication for it, that it may render service and that, 
performed antiseptically, it is harmless. 
The ablation of bony tumors is seldom performed. The operation, easy 
for pedunculated growths, is difficult for the others, that have a-broad base 
of attachments on the bone. It is reserved for some exostosis against which 
other means would be powerless, specially those of the face. Incomplete 
side bones are quite frequently removed, and when a portion of them is 
necrosed. As for the gouging out, with the mallet and gouge, in cases of 
phalangeal exostosis, splints, spavins, etc., it is a condemned method. 
Neurotomy performed above the fetlock, the median or the sciatic, 
according to the localization of the exostosis, is a last treatment which 
may succeed when firing has failed. 
Exostosis are quite common in birds. They develop in preference on 
the bones of the legs, sometimes those of the trunk; either without ap- 
parent cause, or after traumatisms. Hyperostosis of several regions of 
legs have been observed (J. Hunter). Muyschel and Adamovics have 
telated cases of generalized hyperostosis in gallinaceous (Larcher), 
SPECIAL ExosTosis. 
L.— Osselets. 
Bony tumors of the knee, osse/e¢s are generally situated on the lateral 
faces of that region and on the head of the metacarpals. They represent 
high splints, a name under which they are commonly known. More 
frequent on the inside than the outside, they may be double, and in that 
case the internal one is more developed than the external. They are 
sometimes situated in front of the knee, on the bones which form that joint. 
When they are in large number, and in connection with the presence or 
the absence of synovial dropsies, the knee is said to be hooped. 
The prognosis of those exostosis varies very much according to their 
seat. Developed on the anterior and lateral faces of the knee, they in- 
terfere with the movements of the joint, produce a pseudo or partial 
ankylosis and a more or less lasting lameness, while those located on the 
metacarpals, like splints, generally produce only temporary lameness. 
More serious than ordinary osselets is’the exostosis, met in race horses, 
which is spread on a level with the trapezium and the tendons inserted 
upon it. This exostosis, almost always following an effort, a partial lacera- 
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