Apudoma in Cats
 
Apudoma is a gastrointestinal tumor which secretes peptide hormones -- hormones that play a role in regulating metabolism, growth, development, and tissue function. In the long run, the tumor(s) can cause ulcers, damage the esophagus because of chronic reflux, and damage the lining of the intestines.
 
Symptoms
 

Vomiting (sometimes with blood)
Weight loss
Loss of appetite (anorexia)
Diarrhea
Lethargy
Fever
Depression
Excessive thirst
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