Types Of Melanoma

Melanoma What is Melanoma? Melanoma is the most dangerous type of skin cancer. This cancerous growth begins its development when unrepaired DNA skin cells. Unrepaired cells are damaged by ultraviolet radiation from sunshine or tanning beds which triggers defects that lead the skin cells to multiply rapidly and form malignant tumors. Tumors originate in the pigment-producing melanocytes in the basal layer of the epidermis. Melanomas often resemble moles which are black or brown, but they can also be pink, red, purple, blue or white. Melanoma is caused mainly by intense or frequently leading to sunburn especially in those who are genetically predisposed to the disease. If melanoma is treated early, it is almost always curable, but if it is not,
the cancer can advance and spread to other parts of the body, where then it becomes hard to treat and can be deadly. Melanoma is not the most common type of skin cancers, however it causes the most deaths.
Heredity is a big factor in melanoma.
About one in every 10 patients diagnosed with the disease has a family member with a history of melanoma. If your mother, father, siblings or children have had a melanoma, you are in a melanoma-prone family. Each person with a first-degree relative diagnosed with melanoma has a 50 percent greater chance of developing the disease than people who do not have a family history of the disease. The Four Basic Types Melanomas fall into four basic categories. Three of them begin in situ — meaning they occupy only the top layers of the skin — and sometimes become invasive; the fourth is invasive from the start. Invasive melanomas are more serious, as they have penetrated deeper into the skin and may have spread to other areas of the body. Superficial spreading melanoma is by far the most common type, accounting for about 70 percent of all cases. This is the one most often seen in young people. As the name suggests, this melanoma grows along the top layer of the skin for a fairly long time before penetrating more deeply. The first sign is the appearance of a flat or slightly raised discolored patch that has irregular borders and is somewhat asymmetrical in form. The color varies, and you may see areas of tan, brown, black, red, blue or white. This type of melanoma can occur in a previously benign mole. The melanoma can be found almost anywhere on the body, but is
most likely to occur on the trunk in men, the legs in women, and the upper back in both. Lentigo maligna is similar to the superficial spreading type, as it also remains close to the skin surface for quite a while, and usually appears as a flat or mildly elevated mottled tan, brown or dark brown discoloration. This type of in situ melanoma is found most often in the elderly, arising on chronically sun-exposed, damaged skin on the face, ears, arms and upper trunk. Lentigo maligna is the most common form of melanoma in Hawaii. When this cancer becomes invasive, it is referred to as lentigo maligna melanoma. Acral lentiginous melanoma also spreads superficially before penetrating more deeply. It is quite different from the others, though, as it usually appears as a black or brown discoloration under the nails or on the soles of the feet or palms of the hands. This type of melanoma is sometimes found on dark-skinned people, and can often advance more quickly than superficial spreading melanoma and lentigo maligna. It is the most common melanoma in African-Americans and Asians, and the least common among Caucasians. Nodular melanoma is usually invasive at the time it is first diagnosed. The malignancy is recognized when it becomes a bump. It is usually black, but occasionally is blue, gray, white, brown, tan, red or skin tone. The most frequent locations are the trunk, legs, and arms,mainly of elderly people, as well as the scalp in men. This is the most aggressive of the melanomas, and is found in 10 to 15 percent of cases