PRINCIPLES OF VETERINARY SURGERY 



639 



deformities, located chiefly in the bones of the extremities. 

 Most frequently it is confounded with rachitis, but this is 

 clearly distinguished from rachitis by absence of lesions in 

 the cartilage of conjugation. It has also been called "os- 

 teitis deformans." 



ETIOLOGY.— This disease seems to be rather frequent 

 in animals of varied ages. Carougeau observed it in a dog 

 six months old, and also in one two years of age, both of 



Fig. 102. 

 Posterior Portion of a Dog Affected with Diffuse Osteoperiostitis. 



which were Great Danes. Lienaux observed it in an old 

 hunting dog, and also in a mountain dog ten years old. 

 Identical cases have been reported before the present epoch. 

 Bredin reported a case in the "Annals of French Agriculture 

 for 1809-." 



It is apparently an infectious disease, and is undoubtedly 

 the relic of some affliction of youth. Moreover, exostoses 

 and hyperostoses can be produced experimentally in rabbits 



