346 ' Tumors. 



(cited by Casper). Fibromata are frequently found in the tongue 

 of the cow, as well as in the vagina, in the latter situation as 

 pedunculated growths of large size projecting into the vaginal 

 canal. Those fibromata which are found in horses and cattle 

 after injury of the skin and tendon sheaths at the joints of the 

 feet may form enormous masses ; they are apt to have the sur- 

 faces covered with granulation tissue. Fibromyxomata are es- 

 pecially common at the end of the tail and in the heart (epicar- 

 dium and endocardium) as pedunculated growths, as well as in 

 the naso-pharnyx (where they are found hanging from the wall 

 covered with mucous membrane and are known as nasal polyps). 

 The author has observed a perfect string of hard rounded fibro- 

 mata in the lung of a horse (for details v. Kitt, Lelirhnch d. 

 spezicUcu pathol. Anatomic d. Haiisticrc, Verl. v. Enke, Stutt- 

 gart, II. Aufl., 1901). 



A fibroma may sometimes be harmful because of its size and 

 location (occlusion of passages, pressure upon vital organs), but 

 does not give rise to metastasis and usually does not recur after 

 extirpation. 



The hard fibromata of the skin ami tongue undoubtedly are 

 often results of traumatic lesions. The connective tissue scle- 

 roses resulting from injuries by foreign bodies, or that arising 

 after healing of an actinomycotic area, a chronic botryomycosis 

 or even a malignant oedematous infection, may be sometimes 

 such hard, definitely outlined, biscuit-shaped or nodular deposits 

 and prominences that an anatomical distinction between these 

 sequels of chronic productive inflammation and true tumors can- 

 not be made. 



Lipomata. 



The lipoma or fatty tumor is made up of adipose tissue, of 

 clusters of fat cells in various stages of development, along 

 with bloodvessels and fibrous connective tissue. The fat cells 

 are apt to be larger than those of normal adipose tissue. These 

 tumors arise from situations normally rich in adipose tissue, as 

 the mesentery or subserous peritoneal fat. where they frequentl}' 

 occur in the horse. The peritoneal adipose tissue often forms 

 lobular appendages, which when much overgrown and stretched 

 by the intestinal movements become pedunculated and present 

 themselves as pearshaped masses or tumors of the size of a fist. 

 They may give rise to fatal intestinal entanglements. In case 



