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Updated on September 23rd, 2025
Pet's info: Dog | Chihuahua | Female | spayed | 5 years and 11 months old | 8 lbs
I just noticed she has a lump on her hind leg that is the size of a golf ball. I touch it and it doesn't hurt her. She eats and drinks just fine. She still loves going out side for walks but lifts that same leg when walking to fast but she does have the knee cap thing where it pops in and out. What could it be?
2 Answers

Answered By Ana M, DVM
Veterinarian
Published on October 10th, 2019
Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on March 7th, 2017
These lumps on Tana could be cysts, lipomas, benign tumors, or malignant tumors. Unfortunately in a senior dog, there is a always a chance a lump could be cancer. 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 would have Tana seen by a vet tomorrow to have the lumps examined and diagnosed so they can be treated if needed.
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