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My dog has a small lump on her back. Is it a cyst or cancer?

Updated On September 23rd, 2025

Pet's info: Dog | Pit Bull Terrier | Female | spayed | 2 years and 9 months old | 75 lbs

My pitbull has a small what seems to be a cyst on her back, It has not shrunk or grown. Its also under her fur coming out of her skin. She likes to rub her back on the wooden deck and concrete patio in the sun so I figured it could be from that, I just want a second opinion on if it could be a tumor/cancerous before I bring her to the vet. Thank you!

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2 Answers

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on September 4th, 2020

Hello. I really do not think this is cancerous or a tumor. It does look like a small cyst, or even a benign skin tag, so just keep an eye on this for now, but do not worry, just show this to your veterinarian at Evie's next scheduled visit. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

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    Answered By Emily, DVM

    Veterinarian

    Published on June 11th, 2017

    This looks like it could be a cyst or even a zit like mass. Rarely skin cancers can form. If this lump does not go away or gets bigger your veterinarian needs to do an exam. Do not apply any medications or ointments to it.

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