My cat has a soft lump between shoulder blades after vaccine?

Question

My cat had a vaccination a month ago. It was a steroid shot. Now he has a lump between his shoulder blades and I don't know if I'm paranoid or not but I'm afraid it's growing. The lump is soft and moves around but is also attached. You don't know it's there unless youre massaging his back and neck. I don't know what to do. Pet's info: Cat | American Shorthair | Male | neutered | 10 lbs

Daniel Fonza, DVM · Accepted Answer

Hi there and thank you for using pet coach to address your concern. This lump is likely due to the vaccine and with the newer vaccinations for cats, this is likely is nothing to worry about. However, if you would rather be on the safe side I would recommend having your veterinarian take a look at this lump and perform some tests on it. Your vet can insert a small needle into the lump and look at the cells under a microscope or send them out to the laboratory to be analyzed for a better idea of what it may be. The ultimate test would be to take a biopsy punch of the mass or remove the mass and send it out to have the tissue analyzed. This would confirm what it is and would tell you if it is benign or malignant. Because of the history of cats and vaccines with vaccine-associated sarcoma, I would have this checked out sooner rather than later. I hope this helps guide you in the right direction. Please let me know if you have any other questions or concerns and I would be more than happy to answer them for you.

My cat has a soft lump between shoulder blades after vaccine?

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