PRINCIPLES OF VETERINARY SURGERY 521 



has no better foundation than the preceding hypothesis. How 

 can it be conceived that cellular degeneration takes the same 

 form even in different tissues? How is the specificity of a 

 product of cellular degeneration to be explained? 



BOTRYOMYCOSIS OF THE HORSE. 



In the soliped, botryomycosis is manifested by the ap- 

 pearance of tumors on the skin, the spennatic cord, the 

 udder and the viscera. 



(a) The Skin. — Certain regions are more particularly at- 

 tacked. The disease begins in the form of chronic inflamma- 

 tory neoplasms, which become fistulous and discharge a, 

 purulent product containing the botryococcus. The neo- 

 formations have a tendency to invade the surrounding tis- 

 sues. They gradually enlarge by their contiguity to the ad- 

 jacent tissues. The neighboring lymphatic glands are sel- 

 dom attacked. According to Cadiot and Almy "most all 

 fibrous tumors excavated with fistulous tracts are connected 

 with botryomycosis." 



The neoformations may acquire a considerable size. 

 Soula observed a botryomycostic tumor on the forearm that 

 measured 32 to 35 centimeters in diameter. Thomassen re- 

 fers to a voluminous growth, of this nature, on the breast, 

 and Frohner to one on the elbow, three times the size of a 

 man's head, and measuring 86 centimeters through its long 

 axis. Frohner also observed botryomycomas of different 

 sizes in the leg, the thigh, the scrotum, the inferior maxillary, 

 the fetlock and the parotid. Perroncito reports a case in the 

 horse that exhibited a botryomycostic growth on the stifle 

 caused from a kick. Johne found the parasite in fistulous 

 tumors on the back, the chest, and the nostrils. Jensen fouild 

 one on the fetlock and Kitt one on the tail. 



The disease appears to be very frequent in Germany, as 

 Frohner met 52 cases in two years. In France, although 



