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My dog has a stomach mass and fluid in lungs. Is the vet right?

Updated On September 23rd, 2025

Pet's info: Dog | Miniature Poodle | Male | neutered | 11 lbs

Hi, my small poodle/fox terrier mix was diagnosed as having a mass inside his stomach that’s “probably cancer”, that’s causing excess fluid to build up in his lungs. He is being treated with Salix 2x a day. He was brought to the vet yesterday for a chest tap and there was a lot of pink, milky fluid that came out. He had an echocardiogram because the vet heard a murmur. The results were that the murmur wasn’t bad enough to cause this much fluid. I just need to know if this is speculation.

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1 Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 7th, 2019

Without seeing Dolche in person, I can't give an exact diagnosis, but an echocardiogram will show quite clearly the extent of a murmur. It shows exactly how the blood is flowing into the heart, and if there is any back flow. If the vet feels the murmur isn't bad enough to cause this fluid, I would believe it. I suspect it's the tumor. I'm sorry.

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