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My senior dog has fluid-filled lumps on his body. What are they?

Updated On September 23rd, 2025

Pet's info: Dog | Toy Poodle | Male | neutered | 9 years and 10 months old | 13 lbs

Last week I found 2 lumps on my dogs belly. They are approximately the size of a quarter. Feels fluid filled, and on the skin. I just found another lump on his back. No other symptoms at all, no pain, or loss of appetite. He is a toy poodle and is almost 10 years old.

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on January 24th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! These could be benign or malignant growths. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have him evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good night!

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