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My neutered dog has a soft, growing scrotal mass. Is it a fatty tumor?

Updated On September 23rd, 2025

Pet's info: Dog | American Pit Bull Terrier | Male | neutered | 70 lbs

My NEUTERED 7 yr old pitbull has a mass on his scrotum. It's about the size of a peanut m&m. It's soft, moveable, kind of red and fleshy in color, although I can see blood vessels in it. It has grown since I first noticed it, but seems to be staying same size now. Doesn't bother him. Is this a fatty tumor?

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2 Answers

Most Helpful Answer

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on April 11th, 2018

This is probably just some scar tissue or a lipoma (a benign fatty tumor) but since it has recently popped up and seems to be growing I would recommend taking Tucker to the vet to have it checked. Your vet can do a fine needle aspirate and cytology. This is where, using a small needle, a sample of the cells are collected and then can be looked at under a microscope. This way your vet can determine what type of mass it is and if it needs to be removed. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on

    Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. This could be a fatty tumor. It is not possible to know what a growth is just by looking at it and a test is needed. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have him evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good day!

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