Melanoma

Melanoma is malignant melanocytes tumour that origin from the skin and mucous membrane, eyes and central nervous system regions.

The United States each year 25,000 new cases of Malignant melanoma, the death of about 6,000 people. The rapid increase in morbidity. Sunlight is a risk factor for Malignant melanoma, the other risk factors include family history, the occurrence of malignant nevus, large congenital melanocytic nevus and dysplastic nevus syndrome. Rare in black people.

Malignant melanoma are the majority of origin of melanocytes in normal skin, about 40% ~ 50% occurred in nevi (see paragraph 125 dysplastic nevi and nevus). Malignant melanoma in children is rare, but that is born from some very large nevi. Halo nevus usually disappear on their own but in a very small number of cases of melanoma will be. Although easy to develop melanoma during pregnancy, but pregnancy does not increase melanoma nevi for the possibility of malignant transformation. During pregnancy, moles often the changes in shape and size. Prompted the following danger signals nevi malignant: changes in size, color change, red, white, blue, especially the pigmented area surrounding the proliferation of normal skin; changes in surface features, texture, shape change; in particular inflammatory skin around the mole reaction may have bleeding, ulcers, itching or pain.

Malignant melanoma in the size, shape and color (usually pigmented) and local invasion and distant metastasis have a different tendency. The rapid proliferation of the tumor may be in the diagnosis of death a few months later. Early, very superficial lesions of the 5-year cure rate for 100%. Therefore, the cure rate depends on early diagnosis and treatment.