TUMORS OF THE STOMACH. 



In horse — sarcoma, papilloma, lipoma, adenosarcoma, epithelioma, in 

 cattle — scirrhxis, in dog — sarcoma, lipoma, epithelioma. Symptoms : chronic 

 gastritis, periodic indigestions, colics, vertigo, salivation, impacted gullet, 

 blackened faeces, eructations, vomiting, rumbling, stiffness, emaciation. 

 Treatment : laparotomy in dog. 



The peptic stomach in the different animals is subject to a great 

 variety of tumors. In many of the recorded cases, however, the 

 true nature of the tumor has been left uncertain. 



Sarcoma. In the horse this is the common tumor of the 

 pylorus, and less frequently it is found on the cardia and body of 

 the stomach, especially on the greater curvature. These are 

 usually firm and resistant, though sometimes soft and friable ; 

 they tend to swell out in lobules, and show areas of ulceration, or 

 even suppurating excavations opening through the mucosa. In 

 some instances, however, they start under the serous coat, and 

 the ulcerous surface may open into the peritoneum. At other 

 times they are but a local manifestation of a general affection. 



In the dog multiple sarcomata have been found on the stomach 

 varying in size and easily mistaken for recent tubercles. In these 

 cases the small round cells were especially numerous in the centre 

 of the tumor rendering it .soft and predisposing to degeneration. 



Papilloma. In the horse these are found as branching or 

 filamentous dependent projections from the mucosa of the left sac 

 having evidently started from the sores formed by the attachment 

 of the oestrus larvse. They are also found around the pylorus 

 and of such size as to seriously obstruct that orifice (Stadler) . 



Lipoma. Fatty tumors have been seen on the stomach of the 

 dog and horse in the submucosa. 



Adenosarcoma. This formation in the horse leads to a 

 thickening of large patches of the mucosa. It also grows out in 

 mushroom like masses, or is irregularly lobulated. 



Epithelioma. In the horse epithelioma has been found at 

 the pylorus and on the great curvature of the stomach. It 

 usually grows out as a rounded mass varying in size from an egg 

 to an infant's head, and may be even a diffuse thickening of the 

 mucosa. Micrcscopically the individual lobules, are composed 



191 



