Can you tell me about melanoma?

Skin malignancy: Malignant melanoma is a highly malignant skin tumor, that if not brought under control by early surgical removal will metastasize to almost every organ in the body. Most important factor for aggressiveness was first Clarks level measuring depth of penetration but later changed to Breslows classification for thickness. Lesion less than 1mm favorable, more than 2 mm. not good.