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.
Treatment choices. Treatments for melanoma include: 1  Surgery. 2  The entire melanoma is cut out, along with a border (margin) of normal-appearing skin. 3  Chemotherapy, which uses medicines to stop or slow the growth of cancer cells. 4  Immunotherapy, which uses medicines to help your body's immune system fight the cancer.