PANCREATIC NEOPLASMS. TUMORS. 



Often malignant, and secondary. Melanoma in white horse. Carcinoma 

 in mare and dog. Epithelioma. Debility, icterus, abdominal swelling, 

 emaciation. Treatment : laparotomy, or potassium iodide. 



Tumor.s of the pancreas are quite frequentl}' malignant, and 

 show a preference for the head of the organ. The)' may be pri- 

 mary but are more frequently .secondary. 



In gray horses melanotic tumors are found, in connection with 

 similar formations externally, and especiallj' as age advances. 

 Briickmiiller found them of varying size, from a pea to a hazel 

 nut, scattered through the pancreas and adjacent tissues. 



Gamgee records a carcinoma of the pancreas of a mare. 



Carcinoma is more frequent in this organ in dogs, the neo- 

 pla.sm having an irregular form, an imperfect line of delimitation 

 from surrounding parts and a hard, fibrous .stroma enclosing 

 caseous centers, undergoing fatty degeneration. 



Nocard reports an epithelial tumor of the head of the pancreas 

 in a bitch. The animal which had been ill for six weeks was 

 debilitated, emaciated, and icteric with a marked abdominal 

 swelling. It died two iveeks later, and necropsy revealed a 

 whitish sublumbar tumor, the size of a large apple, with irreg- 

 ular roiuided projections. This pressed on the posterior vena 

 cava, surrounded the vena portae and gall duct and completely 

 closed the latter. Micro.scopic examination showed it to be an 

 epithelioma. The liver was undergoing cirrhosis. 



Treatment, usually hopeless, would be by laparotomy. If 

 actinomycosis were present give potassium iodide. 



544 



