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How does uveal melanoma affect the body?

Uveal melanoma is generally caused by the overproduction of certain cells called melanocytes, which produce the colored pigment in your eyes. This cell overgrowth starts on the uveal tract, which is the middle layer of your eye. The uveal tract includes the iris (the colored part of your eye), the ciliary body (a ring of muscle that adjusts the size of your pupil), and the choroid (the layer of blood vessels that surrounds your eye). Uveal melanoma can affect any of those parts, but it most commonly begins in the choroid. If the cancerous growth gets large enough, it can spread to other parts of the eye and may even spread throughout the body.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.