Evolving. In this case, look for whether the mole has an even color or hue. Ultraviolet (UV) radiation from the sun can be harmful to the skin and is the main cause of of skin cancer. Brown is often the normal color, but not always. The mole has been changing in size, shape, color, appearance, or growing in asbestos cancer lawyer an area of previously normal skin. Cancerous moles can have shades of black mixed into shades of brown or tan. Asymmetry means irregular shape. If this errant growth is restricted to a few cells then it poses no threat to humans. Border refers to the outside edge of the mole or spot. In relative terms, the eraser on the end of a pencil is about 6 mm in size.