Tumors develop when cells in the body grow uncontrollably. Finding a tumor on your dog can be very frightening, but they are not always detrimental — some are benign, while others are malignant.

As a dog owner, if you notice a lump on your female dog's mammary gland, caution is advised. It could be a mammary tumor, ...

On 'My Ugly Duckling,' Bae Jung-nam's dog Belle faced yet another crisis ... The identity of the lump was a malignant tumor that developed in the skin and muscles. She was diagnosed with cancer.