TUMORS OF THE LIVER IN CATTLE. 



Sarcoi?ia. Round or spindle shaped celled sarcomata have 

 been described by Sodero and Cadeac, leading in one case to per- 

 foration of the vena portae and death by haemorrhage into the 

 peritoneum. 



Adenoma. Martin records a case of a hepatic tumor formed 

 of adenoid tissue which had extended into the vena portae, and 

 microscopically presented a cylindroid character. In the ad- 

 vanced stages it caused some jaundice, digestive disorder, obsti- 

 nate constipation, progressive and extreme emaciation, and weak- 

 ness which kept the animal constantly in a recumbent position. 



Angioma. These are rarely seen in the yonng but are com- 

 paratively common in old cows as they are in aged men. They 

 form masses of a dark red color and ver}' variable size, and have 

 a limiting sac of connective tissue or merge into the adjacent 

 hepatic structure. Microscopically they consist of a series of 

 irregular lacunae filled with liquid blood, blood clots, or leuco- 

 cytes, and communicating with small blood vessels in the walls 

 and partitions. They are believed to be formed by dilatation of 

 the liver capillaries with subsequent thickening of their distended 

 walls, and atrophy of the nearest liver cells. Cases of the kind 

 have been recorded by Kitt, Martin, McFadyean, Saake, Van 

 der Sluys, Korevaar and others. Though often seen in abat- 

 toirs, they seem to have little effect on the general health, and 

 no special symptoms have been noted as indicating their exist- 

 ence. 



Congenital Cysts. These are found on the anterior surface or 

 lower border of the liver in young calves. They have no con- 

 nection with the blood vessels, nor biliary canals, contain no 

 head of larval taenia, and do not constantly show the presence of 

 any particular bacterium. These walls are thin and their con- 

 tents alkaline, with sometimes slight blood extravasation, or a 

 yellowish deposit in which cocci have been found. Unless con- 

 nected with cirrhosis or other serious disease of the hepatic 

 tissue, their presence seems to have no pathological significance. 



Carcinoma. This has been recorded in the liver of cattle by 



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