Neoplasms. — Tumors of the I)iicstine in Solipeds. 375 



found to follow in certain cases the irritation and exudation of 

 peritonitis. 



Fibroma. Pediculated fibrous tumors have been found in the 

 rectum of the horse and when large ma}^ threaten obstruction. 

 They are usually of a loose fibrous texture, soft and elastic, and 

 are often situated between the mucous and muscular coats. 

 Quite frequently the}' are already in process of fatty or calcareous 

 degeneration at particular points, the debris tending to fall into 

 the intestine and be discharged with the faeces. 



Myoma in the form of hypertrophy of the muscular coat of 

 the bowel, the muscular fibres being increased in number and the 

 wall further thickened by an intermixture of fibrous tissue, with 

 areas of fatty degeneration. This may be confined to one side of 

 the bowel and assume a spherical form, but it tends to contract 

 the lumen until it is little more than half an inch in diameter. 

 Mollereau records one case of myoma of the double colon which 

 measured nearly a foot in diameter. 



Myxoma. These are small, pale, translucent, round or oval 

 neoplasms having a sparse network of fusiform cells and fibres, 

 filled in the main with small round mucus corpuscles. They are 

 not frequent in man and appear to be less so in the lower animals, 

 but Friedberger and Mollereau have recorded two cases of 

 myxoma in the intestines of the horse, and Chassereaud one case 

 connected with the mesentery. In one case a mare pa.ssed such a 

 tumor three inches long and nearly an inch in thickness. Chas- 

 .sereaud's case caused torsion of the floating colon. 



Carcinoma. Cadeac says it is not rare to .see cancer spread 

 from the urinar\' bladder to all the abdominal organs in the horse. 

 Conte describes a case in the duodenum, Marty one on the pelvic 

 flexture of the colon, Latour on the ileo-caecal valve, Mario on 

 the floor of the rectum, and Casper in the lymphatic glands of 

 the spleen, stomach, liver, mesentery and omentum, the last 

 showing a mass of 28 lbs. 



Epithelioma. When in a growing neoplasm, epithelial cells 

 are arranged not only on the surface, but akso in the form of 

 cylinders extending into the substance of the tissues the growth 

 is looked upon as epitlielioma. Morot records a growth of this 

 kind on the horse's colon, and which had grown to enormous 

 dimensions. Roll also mentions it as occurring on the ga.stric 

 and intestinal mucous membrane. 



