Pet Care Blog

Understanding Epulis Tumors in Dogs: What Every Dog Parent Should Know

Dr. Ricky Walther, DVM
Reviewed by Dr. Angela Beal, DVM, FFCP
Updated: Apr 17, 2025
extraction of epulis in dogs mouth

Did you know that oral tumors are among the most common health issues in dogs? While the word “tumor” can sound scary, not all growths are harmful. Epulis tumors, for example, are quite common in dogs, and can often be effectively managed with the right care. Whether you’re a seasoned dog owner or a new pet parent, understanding this condition can help you identify early signs and work with your veterinarian to keep your dog healthy and comfortable.

Key Takeaways

  • Epulis tumors are common, benign growths that develop on a dog’s gums and can vary in size and type.
  • There are three main types—fibromatous, ossifying, and acanthomatous—each with different characteristics and treatment needs.
  • While many epulis tumors are harmless, some can interfere with eating or cause jaw damage, requiring surgical removal.
  • Pet insurance for dogs can help cover diagnosis and treatment costs—Pawlicy Advisor makes it easy to find a plan that fits your budget.

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In this guide, we’ll break down what epulis tumors are, their causes, and symptoms to watch for. Let’s dive in and ensure your furry friend’s smile stays as bright and healthy as ever!

✔️ Reviewed by multiple licensed veterinarians

✔️ Updated with the latest medical data

✔️ Compiled from veterinary research

Jump to the section that matters most to you below.

What are epulis tumors in dogs? 

Epulis tumors are non-cancerous (benign) growths that develop in a dog’s mouth, usually on the gums. They’re among the most common types of oral tumors in dogs and can vary in size and shape. While they’re not typically life-threatening, they can cause discomfort or interfere with eating if they grow too large.

Whether you’re a new pet parent or a seasoned dog lover, knowing about conditions like this is an important part of keeping your dog healthy and happy. 

What are the different types of epulis tumors in dogs?

Understanding the three types of epulis tumors—fibromatous, ossifying, and acanthomatous—can help you work with your veterinarian to decide the best approach for keeping your dog comfortable and healthy.

Here's a closer look at each tumor type:

Fibromatous epulis tumors

  • Description: This is the most common type of epulis. It consists of fibrous, connective tissue.
  • Characteristics: These growths are smooth, firm, and usually pale pink. They typically grow slowly and are often less invasive.
  • Impact: Fibromatous epulis tumors are usually non-aggressive, but they can sometimes interfere with eating or cause mild discomfort if they become too large.

Ossifying epulis tumors

  • Description: This type is similar to fibromatous epulis tumors but contains areas of bone tissue within the tumor.
  • Characteristics: These growths feel harder than fibromatous epulis tumors because of the bony component. They are also slow-growing and non-invasive.
  • Impact: Like fibromatous epulis tumors, they can cause issues if they grow large enough to affect the placement of teeth or chewing.

Acanthomatous epulis tumors (acanthomatous ameloblastomas)

  • Description: This type is more aggressive than the others and originates from the periodontal ligament, the tissue that helps hold teeth in place.
  • Characteristics: Acanthomatous epulis tumors can invade nearby bone and tissue, making them more serious. They are still considered benign because they do not metastasize (spread to other parts of the body).
  • Impact: These growths can cause significant damage to the jawbone and surrounding structures, often requiring more aggressive treatment such as surgery.

If you suspect your dog has an epulis tumor, consulting your veterinarian is essential. They can determine the tumor’s type and recommend the best course of action.

What other types of oral tumors can dogs develop?

Not all growths in a dog's mouth are epulis tumors. While an epulis is a common type of benign oral tumor, several other types of growth and conditions can occur in a dog’s mouth. Some are harmless, while others may require immediate attention. These include:

Malignant (cancerous) tumors

  • Melanoma: A common and aggressive cancer in dogs’ mouths that can spread to other parts of the body
  • Squamous cell carcinoma: A malignant tumor that often grows on the gums or under the tongue
  • Fibrosarcoma: Another malignant growth that arises from connective tissues in the mouth

Benign growths

  • Papillomas: Wart-like growths caused by the canine papillomavirus, typically seen in younger dogs; these growths usually resolve on their own
  • Gingival hyperplasia: An overgrowth of the gum tissue, often seen in certain breeds, such as Boxers

Inflammatory or infectious growths

  • Abscesses: Swollen areas caused by an accumulation of pus, often related to dental disease
  • Granulomas: Growths that form as a response to chronic inflammation or foreign bodies

Cysts and other lesions

  • Dentigerous cysts: Fluid-filled sacs that develop around unerupted teeth
  • Salivary gland cysts: Swellings caused by blocked salivary glands

How can you tell if an oral growth is an epulis tumor?

Epulis tumors are specific to the gums and usually arise near the teeth. They are generally non-painful, slow-growing, and have a firm texture. However, because many other conditions can mimic the appearance of an epulis, it’s essential to have any oral growth evaluated by a veterinarian.

What should you do if you notice a growth in your dog’s mouth?

If you spot an unusual growth in your dog’s mouth, promptly schedule a vet visit. Your vet may recommend:

  • A physical examination, including an assessment of the teeth and gums
  • Imaging (X-rays) to check for bone involvement
  • A biopsy to determine the nature of the growth

Understanding the signs of epulis tumors can make a significant difference in your dog’s quality of life. If you spot an unusual growth in your dog’s mouth, don’t delay—consult your veterinarian to determine the best course of action. With timely care, you can ensure your furry friend stays happy, healthy, and pain-free.

Your pet's health is priceless — let's protect it together.

Ricky Walther, DVM

Dr. Ricky Walther
DVM

Ricky Walther, DVM, is a small animal general practitioner in the greater Sacramento, California area. Realizing the positive financial and medical impact that pet insurance can provide for pet parents and the profession, he lends support and advice to companies like Pawlicy Advisor "The Pet Insurance Marketplace") that simplify the process of connecting with veterinary financing resources.

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