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My 14-year-old Jack Russell has a lump on his tail. What is it?

Updated On September 23rd, 2025

My dog has this weird lump on his tail, hes a Jack Russel aged 14

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1 Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on April 25th, 2019

Thanks for visiting Petco Pet Education Center, formerly Petcoach. Unfortunately this lump looks like a mass and should be tested through your vet. Due to the fact that it has ulcerated, I would highly consider having it surgically removed entirely and then sent off for analysis so that we can determine what kind of mass it is, cancerous or non-cancerous. I hope that you get to the bottom of this mass soon with your vet. Best wishes and take care.

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