Dear Dr. John,Our male cat is 10 years old. About three years ago, our vet detected a large mass in his abdomen, which even then seemed to be as large as a lemon. After several months, we took the … ...

Dear Dr. John,I adore my 4-year-old cat, but between the hairballs and shedding, I sometimes find myself wondering why.The reasons I am writing is to ask your opinion about this fluid-filled cyst t… ...

Answer: The purple bumps that you are seeing in your cat’s ears are not blisters. The small firm lumps are usually a type of cyst. A cyst is a small round cavity that fills with an oily secretion.

A biliary cyst is a large, fluid-filled growth on the bile duct system of the liver. It's the most common type of liver mass seen in cats, but the incidence isn't very high — about 5.5 percent.