Why does my dog have a sudden, hard, large lump near her tail?

Question

My dog has a large lump above her tail to the left of her spine. It came up suddenly. It's hard about the size of a kneecap. Pet's info: Dog | Mixed Breed Large (61lb +) | Female | 5 years old | 73 lbs

Dr. Melanie, BVSc MS · Accepted Answer

This lump could be a cyst, an abscess, a lipoma, or a growth. 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 its cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options if needed. Give Rosemary's vet a call to make her an appointment.

Why does my dog have a sudden, hard, large lump near her tail?

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