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My dog has a lump under her breast bone. Is it cancer? How is it diagnosed?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | spayed | 83 lbs

I have a almost 10 year old beagle mix and I noticed a lump under her breast bone and I'm worried it might be cancer. What are other possibilities and how would it be diagnosed?

1 Answer

Most Helpful Answer

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Answered By Mallori Kaminski, BVSc

Veterinarian

Published on January 21st, 2017

Besides a tumor, the lump could also be an abscess or a cyst. In order to diagnose what it is, Daisy Duke would need to see her vet. He or she would likely start with a fine needle aspirate, which is where a needle is inserted into the lump and a small sample of cells is taken. These cells are examined under a microscope to determine what the mass is.

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