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Lump on my cat's underbelly near his rear. When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Cat | British Shorthair | Male | neutered

I can feel a walnut sized lump on my cats underbelly, in the loose skin under his rear. I was wondering if this is a common place for any specific type of lump and how soon should I take him to the vet.

1 Answer

Most Helpful Answer

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Answered By Rebecca, DVM

Veterinarian

Published on August 21st, 2017

I would recommend having this evaluated fairly soon. It could be a swollen lymph node or abscess or tumor of some sort. The vet can do a needle aspirate of the lump to look at cells and determine what it may be or if it's of concern. Because some tumors can grow quickly it's always better to have lumps evaluated fairly quickly to make sure it's not malignant.

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