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.

Q: I recently adopted Missy, my mother’s middle-aged, mixed-breed dog. She was never spayed, and she has two small masses in her mammary glands. Are these masses likely to be cancer? If not, should I ...

Dogs can develop a wide variety of tumors, ranging from benign (non-cancerous) to malignant. Three of the most common benign tumors we see in veterinary medicine include sebaceous adenomas, Meibomian ...

Recent advances in comparative oncology have highlighted the striking similarities between canine mammary tumours and human breast cancer. Research in this field is leveraging the naturally occurring ...

Estrogen's role in canine mammary cancer is more complex than previously understood, according to new research. The nuanced findings may help explain why dogs spayed at a young age are more likely to ...

If a study linking a Philadelphia veterinarian and a Princeton, N.J., oncologist find better treatments for breast cancer, we might soon have another reason to call a dog man’s best friend. Karin ...

Luke Robinson walked 2,300 miles to find out why his beloved dog died of cancer. Nov. 5, 2012— -- Luke Robinson never liked dogs much until an ex-girlfriend offered him a puppy while he was ...

Just like humans, as dogs age, it’s not uncommon for lumps, bumps and masses to appear on their body. While many of these lumps and bumps are harmless growths and considered benign, others could be ...