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My dog has a growing red lump on his leg. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 85 lbs

My dog has had this mark on his leg for a while (4 months). It now seems to be growing and getting red, whereas before it looked like a large mole. He is not in any pain or discomfort when is it touched. It has not affected his movement at all. Just wondering what it may be and what steps to take next?

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1 Answer

Most Helpful Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on December 16th, 2017

I would recommend to take Atlas in to get that mass aspirated. Any red mass should always be checked as there is the concern for a malignant tumor called a Mast Cell Tumor. The aspiration will most likely be able to tell what kind of mass it is and if it needs to be removed. Do this sooner rather than later! Please post again if you have any further questions!

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