Malignant melanoma Causes and Rish factors

Causes of Malignant melanoma is unknown, but it is caused by two solar burns general more than the sun. Other Malignant melanoma risk factors include:

1. White, blue eyes, pale skin. Susceptible to white people.

2. Black people or dark black skin people is rare, if occur, site also is white skin such as foot, palm.

3. Malignant melanoma occurred in about half of the mole.

4. dysplastic nevus syndrome, a genetic disease autosomal suffering from this disease all over the body are covered with large, flat, flat, not the whole appearance, low color of varying mole, in which one or more of patients in most derived from malignant melanoma. Some people have this syndrome, but no genetic predisposition, and should be closely monitored to guard against the emergence of malignant melanoma.

5. large congenital nevi, more than 2cm from increased risk of malignant transformation.

Pathological types of Malignant melanoma:

1. Extended superficial. About 70%, can be found in any part of the body surface. To expand outward along the surface of shallow, slightly extended to the long direction of the skin deep depth, the so-called diseases of "vertical development period."

2. Nodular. About 15%, can also be seen in any one surface. To the vertical development of the main invasion to the subcutaneous tissue, prone to lymph node metastasis, but also more deadly.
3. Acral type mole. About 10% occur in the palm of your hand, foot, nail bed and the mucous membrane, etc..

4. Mole freckle type. About 5% have occurred since the face of long-term survival elderly black freckles. Horizontal direction to do this type of growth can be extended to around a 2cm ~ 3cm or more.

5. Radiation type is not the growth of malignant melanoma.

6. Hair of the great mole malignant melanoma.

7. Oral, vaginal, anal mucosal malignant melanoma of the source.

8. Unknown primary site of malignant melanoma.

9. The origin of blue nevus in the malignant melanoma.

10. Visceral malignant melanoma.

11. Intradermal nevus originated in childhood malignant melanoma.