What Is Melanoma?
Melanoma is a rare but potentially serious type of skin cancer. Skin cancer is a disease in which skin cells lose the ability to divide and grow normally. These abnormal skin cells can grow and form a mass or "tumor."
A skin tumor is considered benign (not cancer) if it is limited to a few cell layers and does not invade surrounding tissues or organs. If the tumor spreads to surrounding tissues, it is considered malignant, or cancerous. Cancer cells crowd out and destroy nearby healthy cells, forming growths called malignant tumors.
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