Mast Cell Tumor Cat Intestine. Ruby had a tumor in her small intestine called a mast cell tumor. Cats with a mast cell tumor in the spleen typically do much better than cats with a tumor in the intestine.
The spleen of a cat with a splenic mast cell tumor can become dramatically enlarged. Mast cell tumors are a rare skin disease of cats, but the second most common feline skin tumours (following basal cell tumors). The intestine is the portion of the digestive tract between the stomach and the anus.
There were 16 focal intestinal tumors and one diffuse submucosal infiltrate.
Mast cell tumors rarely affect the skin of cats as they do in dogs. Those eating well tend to live much longer. If your cat has the splenic form of the disease, the most commonly observed signs are weight loss, vomiting, and loss of appetite. It is difficult to say what will happen in the long term.