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My old dog has a fast-growing, oozing, smelly leg lump. What is it?

Updated on September 23rd, 2025

Pet's info: Dog | American Eskimo Dog | Female | spayed | 14 years and 2 months old | 30 lbs

14 year old female American Eskimo has rapidly growing mass near hind leg. It appears to be oozing a bit and smells awful. She’s sleeping more but eating/drinking well. What might it be? I don’t believe she can handle surgery.

1 Answer

Most Helpful Answer

Ricardo Fernandez, DVM

Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on April 10th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. Given the fact that it is growing quickly, a malignant tumor is more likely. 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 her evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good day!
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