Skin cancer was abnormalities in the cells of the skin caused by mutations in the DNA of the cells, the rapid cell growth, age of cells and the cells losing their base. Skin cancer usually occurs on the skin, which are often exposed to the sun, but this condition can also occur on the skin, is not directly exposed to sunlight.
Based on the type of cell that attacked, skin cancer is divided into three types, namely:
Melanoma. This is a skin cancer that occurs in the melanocytes or pigment-producing cells of the skin. Skin cancer melanoma is rare but dangerous.
Non-melanoma skin cancer. This is a skin cancer that occurs in a different network than melanocytes. Non-melanoma skin cancers are different in two ways as follows:
- Basal cell carcinoma (basal cell carcinoma, bcc), skin cancer that occurs at the bottom of the epidermis. Basal cell cancer is a type of non-melanoma cancer is most common in humans.
- Squamous cell carcinoma (squamous cell carcinoma, SCC), skin cancer that occurs at the top of the epidermis. Squamous cell carcinoma is quite common, but the frequency was not as much as the basal cellular cancer.
Skin cancers usually occur in regions that are often exposed to the sun, such as the scalp, face, lips, ears, neck, chest, arms and legs. However, in some cases skin cancer may also occur in areas that are rarely exposed to sunlight, such as on the palms of the hands and feet, the underside of the fingers, even in the genital area. Skin cancer can happen to anyone, including people who have dark skin color. Symptoms of skin cancer is different for each type. The description is as follows:
Basal cell carcinoma (BCC). Bcc usually occurs in regions that are often exposed to the sun, such as the face or neck. Basal cell cancer symptoms that are:
- Soft and shiny bumps on the skin.
- Flat lesions on the skin are dark brown or reddish brown like meat.
Squamous cell carcinoma (SCC). SCC also occurs usually in areas of the skin that is exposed to sunlight. But on a dark-skinned person, squamous cell carcinoma often occurs on the skin on the body parts that are rarely exposed to the sun. The symptoms of SCC in general is as follows.
- Hard red bumps on the skin.
- Lesions on the skin that is flat and hard as scaly crust.
Melanoma. Melanoma can grow in any part of the skin, both in normal skin or in an existing mole, that changes become malignant. In males, cancer melanoma usually appear on the face and body. While in women, melanoma often appears in the lower limbs. Good on men and women, melanoma can appear in the skin exposed to the sun. Melanoma can be experienced by anyone, regardless of the color of his skin. On a dark-skinned human, melanoma usually occurs on the palms or the foot and lower part of the finger or toe. Symptoms of melanoma generally occur as follows:
- Brown lumps with black spots on the bumps.
- Moles that change size and color or bleed.
- The formation of small lesions on the skin with irregular edges or lesions are red, white, blue and blue markings.
- The formation of dark-colored lesions on the palms, soles of the feet, hands or fingertips removed.
- The appearance of a dark-colored lesion on the mucous membranes in the mouth, nose, vagina or anus.
The following is a list of ABCDE functions about melanoma to distinguish it from regular moles.
- Asymmetric. form of melanoma generally asymmetric when compared to ordinary moles.
- Border (the suburbs). The edge of the melanoma Umunya wavy, not round like a normal mole.
- Color. The color of the melanoma is a combination of two or more colors.
- The diameter of the melanoma generally exceeds 6 mm.
- Extension (augmentation). Melanoma will be enlarged from time to time.