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What's this solid, unattached lump on my dog's leg near his knee?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 3 years and 8 months old | 121 lbs

Hi just spotted a lump near my dogs knee cap, when I touched it its solid and doesn't seem to be attached but he wasnt keen on me touching it. Hes a big dog and doesn't show pain.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 22nd, 2017

I would have this lump on Jake examined by a vet. It could be a cyst, a benign tumor, or potentially a malignant tumor. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I'd recommend having Jake seen by a vet tomorrow to have the lump examined and diagnose so it can be treated as needed.

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