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My young dog has a new bump on her back leg. Should I be worried?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Female | spayed | 8 months and 20 days old | 40 lbs

Our dog got this bump a couple of days ago. Should I be concerned? It is on her back leg.

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2 Answers

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on March 24th, 2018

Hi, thanks for using PetCoach! Thanks for the pictures. Since Harley is young and based on the appearance of the bump it is likely a histiocytoma. Histocytomas are benign growth that appear on the limbs of young dogs. They are pink, hairless, raised button like growths. They tend to go away on their own in several months. Sometimes they do grow rapidly and ulcerate prompting removal. I hope this helps and I wish Harley the very best! https://www.petcoach.co/article/histiocytoma-in-dogs/

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    Answered By Linda G, MS, DVM

    Veterinarian

    Published on May 3rd, 2018

    Hello. This looks like a histiocytoma, a benign growth also known as a button tumor. They commonly pop up on the limbs of younger dogs & will often spontaneously disappear with no treatment. It is very important though to have your veterinarian confirm this diagnosis as if this is a dangerous growth, you want to have it removed quickly. But it does look like a histiocytoma. Thanks for using Petco Pet Education Center, formerly Petcoach.

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