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My dog has a new, soft, movable lump on her neck. What is it?

Updated On September 23rd, 2025

Pet's info: Dog | Boston Terrier | Female | spayed | 5 years old | 21 lbs

My Boston Terrier (5 years old) has what I would call a big lump on the back of her neck it was not there one day and here the next it’s soft it don’t hurt her when I touch it and I can move it around with her skin

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 14th, 2024

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question about Layla. Poor girl! This lump could be a cyst, an abscess (a pocket of infection), a swelling from an injury, a benign tumor, or a malignant tumor. Unfortunately without seeing her in person, I cannot say for certain what is causing her lump. 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 her vet a call in the morning to get her an appointment. I hope this helps!

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