Somewhat more formally, for a set Ï of properties and relations, a Ï-representation of some structure X is a structure Y that is the image of X under a s homomorphism that preserves Ï. The label representation is sometimes also applied to the homomorphism itself.
Melanoma. This cancer begins in the melanocytes, the cells that provide the skinâs color. Melanoma is one of the deadliest forms of skin cancer because it can spread rapidly inside the body. Approximately one American dies from melanoma every hour.
Changes to cells in the skin can also cause cancer. Different types of skin cells cause different types of skin cancers. When cancer starts in melanocytes, it is called melanoma. When skin cancer starts in squamous cells or basal cells, it is called non-melanoma skin cancer. Find out more about non-melanoma skin cancer.