C43: Malignant melanoma of skin

Malignant melanoma of the skin, commonly referred to as melanoma, is a type of skin cancer that starts in the cells responsible for the production of melanin, the natural pigment that gives your skin its color. These cells are known as melanocytes. Melanoma is distinguished by the uncontrolled growth of these melanocytes. It often appears as irregularly shaped moles, with unusual coloration or variegated shades. The condition is often caused by extensive exposure to the sun's ultraviolet (UV) rays or by tanning beds. Typical symptoms can include new moles, or changes in existing moles such as their size, shape, color, texture, or appearance of bleeding. The progression of the disease can vary depending on the stage of detection, with advanced stages potentially affecting multiple body systems and organs.