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Updated on September 23rd, 2025
Pet's info: Dog | Chihuahua | Female | spayed | 2 years and 11 months old | 14 lbs
Hello, I was wondering if pigmentation on my dogs eye would grow over time, or if they would stay the same size? My dog has a brown spot on her eye and the vet thought it was a pigmentation but it's already doubled in size in two months and now I'm worried it's a melanoma! Thoughts?? How do they treat a melanoma? I read they are more likely benign.
2 Answers

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on December 6th, 2019
Answered By Andrea M. Brodie, DVM
Veterinarian
Published on April 24th, 2020
If your dog has had this from birth and if it has not grown, then it is likely not cancer. The only way to find out whether this is a malignant ocular melanoma is to consult with a veterinary eye specialist. This could be a benign ocular melanocytoma, or just melanistic spot in the anterior eye. But if it has been growing , it very well could be malignant. Cure of the malignant kind would be enucleation (taking the eye out) and hope it has not spread to surrounding tissue. However such tumors rarely metastasize
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