Cells calledmelanocytesare responsible for producing pigment that colors the skin. If your dog has black pigment anywhere on his skin or in and around his mouth, this is because of the pigment that comes from melanocytes.
Diseased melanocytes grow in an unchecked manner, forming a tumor. A combination of hereditary and environmental factors can cause melanocytes to do this. For example, sunlight exposure can increase the risk of developing melanoma of the skin. Certain breeds like Cocker Spaniels, Chow Chows, Golden Retrievers, Schnauzers, and Miniature Poodles have a higher risk of developing melanomas.
Oral melanoma is the most common type of malignant tumor that can develop in your dog’s mouth. It can appear pigmented or can have a non-pigmented appearance known asamelanotic melanoma. What makes it so malignant is that it can invade underlying bone and spread to other parts of the body, causing facial swelling and eventually making it difficult and painful for your dog to eat.
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