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What do dog leg x-rays mean? Is it bone cancer or a fungal infection?

Updated On September 23rd, 2025

Male neutered 160lbs 3-4years old X-ray of right front leg What is wrong with my dog’s leg?

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Answered By Emily Fukuzato, DVM

Veterinarian

Published on June 10th, 2019

Hello and thank you for reaching out about your dog. These xrays are very concerning for either a fungal infection (very much dependent on where you are living) or a bone cancer (osteosarcoma). These xrays I am sure have also been evaluated by your veterinarian and hopefully a radiologist as well. I would recommend chest xrays to look for cancer metastasis or diffuse fungal infection and you may need to have your veterinarian perform a bone core biopsy for a diagnosis. This is usually very painful and your dog should be on good pain meds and rest during this time. Treatment options are very different for bone cancer vs. fungal infection so a proper diagnosis is extremely important. Best of luck!

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