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My dog has a lump. Is this growth dangerous or a sign of cancer?

Updated On September 23rd, 2025

Pet's info: Dog | Australian Shepherd - miniature | Female | spayed | 3 years and 11 months old | 36 lbs

Is this growth dangerous?

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1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on July 14th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! It is likely a sebaceous adenoma which is a benign growth. Some dogs get a lot of them. Another possibility is a mast cell tumor. They can be diagnosed on cytology of a fine needle aspirate of the growth. If it changes in size or grows rapidly I would have it removed or at least aspirated to be sure it isn't a mast cell. I wish you and Luna the best!

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