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My dog's recurring lump below her rib changed. Is it life-threatening?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 7 years and 4 months old | 35 lbs

I have a 7 year old beagle, she's had a lump appear and disappear in the same spot just below her rib throughout a few years, she's probably had it for the 5th time now. But the first few lumps were movable, soft feeling. this time the lumps is bigger, hard and more lumpy and Im really concerned! Do you have an idea of what it could be? And is it lifethreatning? I dont want to lose my baby girl!

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3 Answers

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on May 11th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Pupsie! The growth is very large and I worry about the location. Since she isn't spayed I worry that the mass is associated with a mammary gland. Mammary gland masses can be cancerous or benign. The growth could also be a lipoma (fatty deposit) or a cyst. I highly recommend getting her in to your Vet to have it evaluated. Your Vet can discuss whether aspirating it is worth while or you should just schedule to have to removed and biopsied. I wish you and Pupsie the very best!

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Related Answers from Veterinarians

  • Published on May 7th, 2018

    That could be due to a mastitis (infection of the mammary gland) or possibly the tumor could have turned not benign anymore. This kind of lump/growth needs to be ideally assessed by your veterinarian to have a definitive and specific answer. Usually there are two ways your vet can do that a part from examining it directly during physical examination. A biopsy can be taken under local or general anesthetic, otherwise a smaller sample through a fine needle can be aspirated (this technique is called FNA= fine needle aspiration). The biopsy usually give definitive/reliable results. Chest x rays may be needed as well in case of a tumoral growth. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on June 30th, 2019

    It could be a mammary gland tumor. It's concerning that it keeps getting bigger every day. 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. Give Alice's vet a call to make her an appointment. Best of luck.

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