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My dog has a new lump on her ear. When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 6 years and 10 months old | 40 lbs

What is this lump on ng dogs ear, just appeared, didn't have it 3 weeks ago

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3 Answers

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on October 30th, 2019

If this just showed up, I would recommend having a veterinarian take a look at this. It may be a type of tumor that needs to be removed called a mast cell tumor. I would err on the side of caution and have the veterinarian look at this and perform some additional testing on it. I hope this helps! Please let me know if you have any other questions or concerns and I would be more than happy to help you further.

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7Pet Parents found this answer helpful

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    Answered By Jenny, DVM

    Veterinarian

    Published on January 27th, 2018

    I would definitely get it check and see about removal to be safe. There is a good change it is a histiocytoma which are not cancerous and sometimes can go away by themselves. however mast cell tumors can be aggressive and have the same appearance. you vet can take an aspirate to see if surgery is needed or if you can wait it out to see if it goes away on its own.

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    Answered By Ana M, DVM

    Veterinarian

    Published on October 2nd, 2019

    Thank you for submitting your question regarding your Rosie. I recommend that she sees her veterinarian. A procedure known as a fine needle aspirate will likely be performed. The veterinarian will use a small needle to collect a sample of cells to evaluate under the microscope. This will help the veterinarian diagnose the mass. There is a benign growth known as a histiocytoma. Unfortunately, it has the same outward appearance as an aggressive form of skin cancer called a mast cell tumor. I hope this information helps!

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