Chapter20ano

Chapter20ano - Skin Cancer: Prevention and Early Detection...

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    Skin Cancer: Prevention and Early Detection James M. Eddy Texas A&M University
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    Skin Cancer: Facts and Figures Most common type of cancer in the US 1 million new cases diagnosed annually 1 out of 3 cancers diagnosed is skin cancer 40 to 50% of people who live to age 65 will have skin  cancer at least once Melanoma is the most common cancer for 25-29 year olds Since 1981 the incidence of melanoma has increased 7.1%  annually Almost 100% curable if found early and treated properly
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    Your Skin The skin protects us against heat, light, injury, and  infection Regulates body temperature and stores water, fat, and  vitamin D Skin is the body’s largest organ The  epidermis  (outer layer of the skin) is mostly made  up of flat, scale-like cells called  squamous cells ; and  under these lie round cells called  basal cells . The deepest part of the of the epidermis also contains  melanocytes , which are the cells that produce  melanin   (which gives the skin its color).
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    Your Skin
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    What is Cancer? Cancer is a disease of some of the body's cells. Healthy cells that make up the body's tissues  grow, divide, and replace themselves in an  orderly way. Cancer is the result of normal cells losing the  ability to limit and direct their growth. They divide  too rapidly and grow without any order. Too  much tissue is produced, and tumors begin to  form. 
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    Types of Tumors Benign tumors  are not cancer. They do not spread  to other parts of the body and are seldom a threat  to life. Often, benign tumors can be removed by  surgery, and they are not likely to return. Malignant tumors  are cancer. They can invade  and destroy nearby healthy tissues and organs.  Cancer cells also can spread, or metastasize, to  other parts of the body and form new tumors.
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    Types of Skin Cancer Carcinoma is cancer that begins in the cells that cover or 
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Chapter20ano - Skin Cancer: Prevention and Early Detection...

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