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What is this bright purple, grape-sized lump on my dog's shoulder?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 8 years and 9 months old | 48 lbs

My dog has a lump on her left shoulder. It is bright purple and about the size of a grape. What could this be?

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1 Answer

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Answered By Dr Stafford, BVetMed, MRCVS

Veterinarian

Published on July 16th, 2017

This looks like a mass in the skin, it could be a reaction to infection, a benign tumour such as a skin tag or a cancerous tumour. I would get it tested by your vet to decide the bedt course of action.

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