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Dog tumor: Is a new mass test needed before treatment or oncologist?

Updated On September 23rd, 2025

Pet's info: Dog | Soft Coated Wheaten Terrier | Male | neutered | 40.8 lbs

Hi, my dog had a tumor that was diagnosed as seminoma with vasicular invasion. They did an additional 3 x rays and ultrasound and found a mass btw his stomach and bladder. The doctor recommends a fine need aspirate of that mass. Does he need to have this tested before treatment or me consulting an oncologist? Can this be assumed as metastic seminoma? I don’t want to have to put him under/thru more tests if unnecessary. Thanks!

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 17th, 2018

I'm sorry Guinness has a tumor! Yes, it would be a good idea to have a fine needle aspirate (FNA) of the mass between his stomach and bladder. This will help identify if this is malignant or not, and what treatment may need to be done. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform, so it won't be an invasive procedure. I hope this helps!

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