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My dog has a new, rapidly growing, weeping lump. What's next?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 11 years and 4 months old

My dog has a bizarre lump that's appeared today and got bigger through out the day it seems to be weeping a little bit but it doesn't look like he's in pain with it at all just Wondering what your advice is? Thankyou

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on September 26th, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach! Given that this has only been present for one day and has increased in size rapidly and has some discharge associated with it, this may be an abscess. Otherwise it could be a benign or malignant growth. I recommend you have Ronnie evaluated by your veterinarian for a test called fine needle aspirate which is an easy, quick and pain-free procedure which in the majority of cases will help reach a diagnosis to identify what the best course of action is based on the findings. In some cases, a biopsy is needed for a diagnosis. If it is an abscess, drainage and antibiotic therapy will be recommended. If it turns out to be a tumor, then treatment will be recommended according to the tumor type and other findings. Good luck! Keeping my fingers crossed that it is something benign.

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