Skin cancer is the most common of all the types of cancers (Skin Cancer).  It is a disease where malignant, or cancerous cells can be found in some layer of the skin.  The epidermis, or the top layer of the kin, has three kinds of cells:  basal cells, squamous cells, and the melanocytes (Skin Cancer).  The melanocytes produce melanin, which is pigment that gives the skin its colour.  Sometimes clusters of melanocytes can form growths called moles.  These moles can sometimes become cancerous.  Skin cancer tumours are formed when these cells excessively divide.  They are known as malignant tumours.  The tumours are not skin cancer when they are designated as benign.  The cancer cells in the malignant tumours can break away and spread throughout the body.  This can occur by way of the blood stream of lymphatic system (Melanoma).

        Skin cancer is categorized into three types:  basal cell carcinoma, squamous cell carcinoma, and malignant melanoma.  Basal cell carcinoma is, by far, the most common form of skin cancer (Skin Cancer).  Luckily, it will never spread throughout the body.  Basal cell skin cancer usually forms due to years and years of skin damage.  Therefore, it is most often found on the sun-exposed areas of older adults.  Such areas include the nose, face, back, and neck.  Basal cell carcinoma is definitely curable with treatment.  The second most common form of skin cancer is squamous cell carcinoma.  Men over age 55 are most likely to develop this type of the disease.  Squamous cell skin cancer usually develops over time.  Similar to basal cell carcinoma. This type is usually found on areas that have endured many years of sun exposure (Skin Cancer Guide).  The most serious form of skin cancer is the malignant melanoma.  It is the cause of most skin cancer-related deaths (Melanoma).  Malignant melanoma is the most likely to spread to other parts of the body.  This tendency to extend makes melanoma extremely dangerous.  Found in melanocytes, this type of cancer can also develop on other parts of the body (Skin Cancer Guide).  The eye is also susceptible to this cancer (Melanoma).  More often then men, women have occurrences of melanoma (Skin Cancer Facts).  On a man, it can usually be found on the trunk, head or neck.  The arms and legs are typical areas for melanoma to be found on a woman (Introduction to Skin Cancer).

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        Additionally, each form of skin cancer has distinguishing characteristics.  Basal cell carcinoma could appear as a sore that grows slowly, yet does not itch or hurt.  It may have a dimpled middle or rounded edges.  Typically, basal cell carcinoma will appear in an area with sun damage.  There is no conventional size or shape for it to be.  Squamous cell carcinoma may be a raised bump in the skin with an ulcer in the center.  It is usually small and scaling.  Sometimes it can even be disfiguring.  Like basal cell carcinoma, squamous cell carcinoma mostly occurs on sun-exposed areas of ...

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