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My dog has a red, sore, bleeding lump. Is it cancer or a cyst?

Updated On September 23rd, 2025

Pet's info: Dog | American Bulldog | Female | unspayed | 9 years and 5 months old

My dog has what i thought was cyst. But it has gone red and sore looking and can bleed. Could it be cancerous

2 Answers

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on March 29th, 2017

Some possible causes of Fizz's mass could be benign or malignant masses (yes, cancer is a possibility), a granuloma, or cyst. In order to diagnose the type of lesion, Fizz should see her vet for an exam and fine needle aspirate (FNA) of the lesion. The FNA is performed by drawing a few cells from the lesion with a needle and then examining them microscopically. This will help your vet to determine the type of mass present and if surgical excision is necessary. Even benign masses can become red, irritated, and possibly infected if Fizz is licking or scratching at it. Until her appointment with her vet, try to keep her from licking or scratching at the mass by using an e-collar (cone) or t-shirt, depending on the location of the lesion.

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Other Answers

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    Answered By Dr. Leigh, DVM

    Veterinarian

    Published on

    It could be cancerous but it could also be benign. Have your vet take a look at her to determine the cause. Your vet can do a needle aspirate to help diagnose and then determine the best way to treat. If it is bleeding than it might just be best to remove the lesion.

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