Case Report: Canine Oral Malignant Melanoma, Male, Age 12

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An illustration of a dog with a focus on its mouth, highlighting a malignant melanoma. An inset shows a close-up of the tumor, which appears as a cluster of dark, irregular spots. This depiction emphasizes the appearance and location of oral malignant melanoma in canines.

Canine Cancer: A Pet Owner’s Journey with Fenbendazole Treatment

This case report is from a reader who successfully treated her 12-year-old dog’s metastatic oral melanoma with Fenbendazole.

Her 12-year-old dog was diagnosed with a severe case of oral melanoma after a large tumor was found growing on his gum. Biopsies confirmed it was malignant, and it was surgically removed.

However, based on the metastasis, the vets said that the dog would probably only have a few months to live as the cancer had spread throughout his body.

She refused to give up on her loved one so easily, so she started to research alternative treatments. The owner stumbled across the Fenbendazole cancer protocol and decided to go for it.

This is what the Fenbendazole treatment regimen involved:

  • Daily Fenbendazole powder mixed in her meals.
  • CBD drops.
  • One 1500mg turmeric capsule daily.

Defying the Odds: How Fenbendazole Cured a Dog’s ‘Incurable’ Cancer”

There is no question in my mind that Fenbenzadole cured the pet’s incurable cancer. She has also continued giving him the recommended 50 mg five days a week dose of Fenbendazole outlined in the protocol for over a year now.

On December 12th, the dog will be celebrating his 14th birthday, and there are no signs that the cancer has returned. The owner is beyond happy!

She is convinced that Fenbendazole cured her dog’s cancer, which medical treatment ultimately failed to completely eradicate.

Questions and Answers

Q: What was your Fenbendazole dosing regime?

A: Because Hershey weighs around 10 pounds, I gave him a 50 mg dose of Fenbendazole powder mixed into his food once daily.

Q: How long did you give him Fenben during the active treatment phase?

A: I have been giving my dog the Fenben daily since he first began showing symptoms of oral cancer, which was over a year ago now.

I did not increase the dosage from the 50 mg daily dosage. I am going to keep him on this low dose as long as he is alive.

Q: When did you notice him getting better?

A: I’m not sure exactly when the cancer started responding, but my pet never got any worse, even though the type of cancer he had was meant to spread throughout his body eventually.

But it never did. His last two trips to the vet showed no abnormalities at all. My vet believes my dog is now cancer-free.

Q: Anything else you’d like to add?

A: The vet has started to use Fenbendazole on other pets with cancer in her practice. The vets there tell the owners there is a good chance it can prolong their pet’s life. They always tell them about this amazing story.

Even the surgeon who operated on my pet can’t believe he has survived his cancer and is still going strong.

How Fenbendazole Gave a Little Dog a Cancer-Free Life

Image depicts owner of a dog who beat cancer by usinf fenbendazole. Fenbendazole works for dog cancer.

That is such a heartwarming outcome and happily-ever-after case study. The little dog is lucky that his owner heard about Fenbendazole and decided to try it.

Given that her pet has remained cancer-free for over 14 months since his surgery with no traditional treatments for cancer, it is highly likely that Fenbendazole removed the remains of his tumor, including any potential new ones.

Understanding the Challenges and Prognosis of Dog Melanoma

The National Library of Medicine (NIH) states that canine oral melanoma is the most common type of melanoma in dogs. It accounts for up to  3–8% of all abnormal growth-related diseases in dogs. Oral melanoma tumors are malignant, meaning they are cancerous and invasive and have high rates of spreading to other areas.

If not treated, these malignant oral melanomas will grow rapidly and unpredictably, causing pain and reaching large sizes as the cancer spreads quickly to other organs throughout the body.

Melanomas in dogs have an unfortunately poor prognosis, even with treatment. Most dogs diagnosed with the aggressive oral form of melanoma will succumb to the disease within a year, as it typically spreads quickly despite prompt care. Early symptoms can look like darkly pigmented patches, or bumps in the mouth that may be flat or raised.

Some oral melanomas lack coloration and appear reddish or pink instead of black. As the cancer advances, the abnormal growths can increase substantially in size and potentially become ulcerated, which causes bleeding and significant discomfort for the affected animal.

  • Dogs treated surgically for stage I melanoma typically survive about 17-18 months on average.
  • Those with stage II melanoma have a survival time of 5-6 months post-surgery.
  • Dogs that have reached stage III at diagnosis live approximately 3 months even after tumor removal.
  • Canine patients with advanced stage IV melanoma that has spread to the lungs usually only survive a couple of weeks.


Marik, P. E. (2023). The role of repurposed drugs and metabolic interventions in treating cancer

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