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My dog has osteosarcoma. Is a blister on the other paw normal?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 10 years and 7 months old | 24 lbs

Is it common for small breed dogs diagnosed with osteosarcoma to form a blister on the other side of the paw as the original tumor? This looks more like a blister & is not hard like the existing tumor. Should I go get it drained by the vet? Just trying to keep her comfortable. Thank you

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1 Answer

Most Helpful Answer

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on March 7th, 2018

I'm so sorry to hear that Lucy is dealing with osteosarcoma. It is difficult to tell from the picture exactly where the swelling is. We will sometimes see wounds or pressure sores from changes in how they stand or lie down which can sometimes get infected, so I would have your veterinarian examine Lucy to determine what the new swelling is and decide on the best treatment. Good luck! I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

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