My old rat has a red, hard, rough lump on its stomach. What is it?

Question

My (very old) rat suddenly developed a bump on his stomach. I thought it was a hernia, but after feeling it I am not sure. It is red, hard, and feels rough. It is also oval-shaped, about the length of a quarter, and sticks out from his stomach slightly. It does not seem to be bothering him a lot, as he's still eating/drinking/moving/peeing/pooping normally, but he is laying on his side more often. Pet's info: Small Animal | Unknown - Small Animal | Male | unneutered | 1lb

Angel Alvarado, LVT · Accepted Answer

Unfortunately, senior rats are predisposed to developing malignancies late rin life. To confirm this, you will need to have Dobby examined by your veterinarian. A fine needle aspirate can be done in the clinic to collect samples for pathology. Once results are returned, you can discuss treatment options with your vet. Monitor for bleeding, ulceration, odor, lethargy or decreased appetite. Keep him on paper towels and change them daily or as needed to keep the area clean and dry.

My old rat has a red, hard, rough lump on its stomach. What is it?

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