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My dog has a non-painful lump on his side. Could it be cancer?

Updated On September 23rd, 2025

Pet's info: Dog | Doberman Pinscher | Male | neutered

Ivan is approximately a 5 year old Doberman. Today while i was walking him i noticed a lump on his side right where his ribs end. It's a little big bigger than a golf ball, not really moveable and doesn't cause him pain. Im not sure what is is but i'm worried it could be a cancerous tumor.

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1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on April 12th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. It is not possible to know what type of growth it is without having it tested. 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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