It is more common in male dogs and can be removed with surgery, but it often grows back. Malignant melanoma: If the tumor is in the mouth, it can appear as an ulcer or just pigmented tissue ...

L ipomas, or fatty tumors, are fairly common benign growths in senior dogs. Lipomas are commonly found on breeds such as ...

Tumors can appear anywhere on a dog’s body, including internally or on the skin. They can look like a small bump or they can appear as a giant mass, bulging out of your dog’s body. Tsang notes ...