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My senior dog has a growing lump on his leg. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | English Setter | Male | 50 lbs

My English Setter (10yrs) has what seems to be either a growth, or a swollen leg that has started about 4 months ago and very slowly progressed, he has a few small fatty tumors on his body as well, in case this could be relevant. The texture can vary, sometimes it is about the texture of the fatty tumors, maybe more dense, and sometimes it can be a little more tighter and denser different times of the day. The growth is on both sides of the leg. He does not baby this leg. What could it be?

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1 Answer

Most Helpful Answer

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Answered By Dr Stafford, BVetMed, MRCVS

Veterinarian

Published on May 15th, 2018

Looking at the photo and considering your description of the progression of this, I would suspect that it is a growing mass. It could simply be a fatty lump such as a lipoma. Other possibilities would be a soft tissue swelling due to trauma, but this seems less likely considering the progression. I would head to the vet and get them to test the lump to see exactly what it is. If it is just a lipoma and not causing bother it should not need to be removed.

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