My senior cat has a growing lump on her butt. Is it serious?

Question

Content Warning: Really gross lesion on a cat butt My cat has this lesion that has been growing bigger over the last month. I have applied antibiotics however it only seems to be getting worse. She does not seem to be bothered by it at all. I clean it for her if it starts to bleed, and she does not react in any way to my doing so. She is a 13-year-old tabby who has been in my company for about five years now. She has never had any health issues before this and is caught up on all of her shots. Pet's info: Cat | Mixed Breed | Female | spayed | 11 years and 8 months old | 13 lbs

Dr. Melanie, BVSc MS · Accepted Answer

That's quite a big lesion and I'm concerned in a cat Cricket's age, that could be a cancerous tumor. It's quite alarming that it's getting bigger and worse. This needs to be checked out by a vet asap. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of its cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options if needed. Please take her into a vet this weekend. Best of luck.

My senior cat has a growing lump on her butt. Is it serious?

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