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What's this lump near my dog's anus if anal glands aren't swollen?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | neutered | 11 years and 9 months old | 20 lbs

Is this a perianal adenomas? This is located in the bottom left corner of his Anus. Vet said his anal Glands aren’t swollen or impacted

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2 Answers

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on November 18th, 2018

This could be a perianal adenoma, carcinoma, or an abscess or cyst. You should have it examined by your veterinarian. An abscess can usually be treated with antibiotics and/or be lanced, and a cyst can be evacuated. Your vet may want to do a fine needle aspirate (he takes some material from the bump with a needle and then looks at it under the microscope) to determine whether the mass is concerning.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on May 7th, 2017

    This squishy growth on Riley's anus could be a perianal adenoma (benign), which is common in intact males. It could also be a perianal gland adenocarcinoma (malignant). I would have him seen by a vet for this growth. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the growth 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. If it is an adenoma, it carries a good prognosis and after treatment, less than 10% reoccur. Adenocarcinomas are less common and carry a fair to guarded prognosis given that it is an aggressive tumor. Both require treatment, which the vet can discuss with you.

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