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My cat has a hard, painless white lump on his shoulder. What is it?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | unneutered | 6 lbs

My cat has a hard white lump above his left shoulder. It’s not very big and seems to cause no pain when touching it. what could cause this?

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1 Answer

Most Helpful Answer

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Answered By Maria DVM

Veterinarian

Published on February 13th, 2018

From the pictures, it almost looks like a cyst. WIthout a biopsy or aspirate, I cannot say 100%. I would recommend having a veterinarian take a look at it in person to see if it is something that needs to be looked into further. Thank you for using Petco Pet Education Center, formerly Petcoach.

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