The skin is made of a variety of cells, many of which are in constant motion. Round basal cells below the surface flatten as they rise to replace dead, flaking squamous cells on the surface. Melanocytes tan the skin in the sunlight, and Merkel cells give skin its ability to sense touch.
Skin cancer is by far the most common type of cancer. Nearly all skin cancers can be treated effectively if they are found early, so knowing what to look for is important. There are many types of skin cancer, each of which can look different on the skin.
Back to Health A to Z. The term non-melanoma distinguishes these more common types of skin cancer from the less common skin cancer known as melanomawhich can be more serious. It affects more men than women and is more common in the elderly.
Skin cancer is the uncontrolled growth of cancer cells in the skin. Left untreated, with certain types of skin cancer, these cells can spread to other organs and tissues, such as lymph nodes and bone. Skin cancer is the most common cancer in the United States, affecting 1 in 5 Americans during their lifetimes, according to the Skin Cancer Foundation.
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Examples of skin cancer pictures. For other mole pictures, check our galleries:. The skin cancer pictures give you an idea of what skin cancer can look like.
The earlier a skin cancer is identified, the easier it's to treat. To spot skin cancers early, it helps to know how your skin normally looks. That way, you'll notice any changes more easily.
There are three main types of skin cancer. The most serious is melanoma. Like all body tissues our skin is made up of cells: basal cells, squamous cells and melanocytes.
Skin cancer — the abnormal growth of skin cells — most often develops on skin exposed to the sun. But this common form of cancer can also occur on areas of your skin not ordinarily exposed to sunlight. There are three major types of skin cancer — basal cell carcinoma, squamous cell carcinoma and melanoma.