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My cat has a painless circular lump on his lower back. What is it?

Updated on September 23, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 10 years and 5 months old

my cat has a circular area on his lower back. It has been there for a few months. It does not appear to give him any trouble or pain. Thank you

1 Answer

Most Helpful Answer

Answered By Lotus Altholtz

Veterinarian, Board-Certified Lab Animal Medicine Specialist

Published on January 24, 2019

The picture on the right looks like it may be a hemangioma which is a benign (harmless) tumor of blood vessel lining cells. These tumors are not uncommon in dogs but are more rare in cats, with the highest incidence in older male cats. Your vet will likely be able to do a fine needle aspirate of the mass and send the smear/slides out for cytology. Hemangiomas usually come back as mostly blood with a few blood vessel lining cells. Usually surgical removal under anesthesia is curative if the mass is confirmed to be a hemangioma, however monitoring without treatment is reasonable with these tumors. Avoiding excessive exposure to sunlight is also recommended with these tumors. Good luck!

1Pet Parents found this answer helpful

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