92 PEXNCIPLES OP YETERINARY SUEGEEY 



influences are believed in by some, while tbe main causa 

 seems to lie in a fibromatous predisposition of the tissues or 

 animal, the exact nature of which is unknown. 



Name the seats of predilection of fibromata. 



1. Skin and subcutis. In the horse, they occur mainly 

 about the sheath, head, shoulder and withers ; are usually 

 solitary and sharply defined ; occasionally multiple in size j 

 they range usually from pea to apple size. Those in th» 

 subcutaneous tissue are mostly encapsulated. In the ' dog, 

 fibrous tumors, occasionally pedunculated, are common about 

 the extremities, eyes, ears, along the back and in the mam- 

 mary gland. 



2. Mucous membranes. They are either pedunculated or 

 have a broad basis. Other neoplasms exhibit the same- 

 symptoms : sarcoma, actinomycoma, lipoma. 



(a) Nasal cavity. Of special importance are the fibro- 

 mata growing here, as they lead to stenosis and thus nasal 

 dyspnoea, chronic nasal catarrh (with more or less stinking 

 discharge in case of ulceration). 



(&) Pharynx, larynx. Are quite rare in the horse ; in the- 

 ox, usually actinomycotic. 



(c) Vagina and uterus. More commonly met with in the- 

 cow, bitch and sow. 



(d) Milk ducts of the teat. Pedunculated fibromata ar& 

 quite common in the cow. 



(e) In the udder. They are often seen in the bitch, ara 

 hard, nodular, circumscribed, of egg to fist size, and fre- 

 quently are of a compound type, as adenofibroma, myxo- 

 fibroma. 



(/) Testicles. Same as in the udder in both dogs anl 

 horses. 



