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My dog has a large, growing gum mass. Is it serious or cancerous?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 9 years and 10 months old | 46 lbs

My dog has gimgival hyperplasia, and I've been hesitant to take her to the vet but I was told she needs a fine needle aspirate... it has at least at least doubled in size since 6 months ago or more. Any insight into possible outcomes or surgery? It's pretty big & on the upper left hand side of her mouth , far back, behind her longest tooth. Thank you so much.

1 Answer

Most Helpful Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on May 7th, 2018

Thanks for visiting Petco Pet Education Center, formerly Petcoach. Gingival hyperplasia is usually benign so am aspirate don’t needed in these cases, just surgical removal of the extra gum. However if your vet feels the tissue looks abnormal, this is then classified as a gingival mass. In which case surgical removal and sending the tissue off to the lab for analysis would be the next best step towards finding out if the mass is benign or cancerous. Perhaps you can resubmit your question with a photo of the growth so that we can at least give you an opinion of whether this looks like excessive gum growth (hyperplasia) which isn’t of concern, or a suspicious gingival mass that should be further tested. I hope this helps! Best wishes and take care.

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