192 Veteriyiary Medicme. 



of cylindroid cells surrounding a central mass of epidermoid cells. 

 The stomach may be greatly contracted, and the surface of the 

 neoplasm, ulcerated or even excavated. In the dog similar for- 

 mations are found. 



Carcinoma. In Q.2i\X\& Scirrhus oi the abomasum is described. 

 Small tumors rise to a height of )^ to 3 inches, and are closely 

 packed together so as to assume polygonal forms. The surface 

 is smooth, or perforated by orifices leading into ulcerous or sup- 

 purating cavities. On section the mass shows a fibrous or a larda- 

 ceous consistency. They are most common in the p3'loric region, 

 and may partially obstruct this orifice. 



Symptoms. These are neces.sarily obscure. In the horse 

 periodic gastric indigestions and colics may be the sole indications, 

 which are certainly not pathognomonic. In other cases, have 

 been noticed : vertigo, salivation, impacted gullet, and blackish, 

 sanguinolent faeces due to ulceration and hemorrhage from the 

 tumors. 



In cattle have been observed variable and capricious appetite, 

 imperfect rumination, tympany, eructations, vomiting, rumbling 

 of the bowels, constipation, slow painful walk, progressive 

 emaciation and debility. When blood is discharged by emesis or 

 defecation the suspicion of gastric tumor may be strengthened. 



In the dog there are the usual signs of chronic gastritis, thirst, 

 anorexia, stiffness, a disposition to lie, sunken eye, dyspnoea, 

 vomiting, often of blood. The discharge of blood bj' mouth and 

 anus, the distended abdomen, the tumor usuall)^ easily detected 

 by manipulation, and the progressive loss of condition are 

 .strongly suggestive. 



Treatment of these cases is hopeless. In the dog alone for a 

 circumscribed tumor, laparotomj^, the removal of the tumor and 

 closure of the wound mav be tried. 



