My neutered dog has a walnut-sized lump at his penis base. What is it?

Question

My 10 year old cockapoo has an enlargement at the base of his penis about the size of a walnut. He's been neutered since being a puppy. it doesn't bother him and he has normal urination. Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | neutered | 10 years old | 16 lbs

Anna M., DVM · Accepted Answer

I'm wondering if what you are describing are your dog's bulbourethral glands. These are glands on either side of the penis that can swell, and in a dog the size of Ollie they would appear about walnut-sized. This can happen even if a dog is neutered. If this is what you're seeing, the enlargement will fluctuate in size and at times will nearly disappear. If what you're seeing is more growth-like (and particularly if it's asymmetrical, rapidly growing, etc) then I would be more concerned about it being a possible mass, and would advise having it looked at by a vet. Hope that helps!

My neutered dog has a walnut-sized lump at his penis base. What is it?

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