Malignant melanoma is a type of skin cancer that develops in melanocytes, the cells that produce the pigment called melanin. Melanin is the pigment that gives the skin its color. Malignant melanoma is the most deadly and aggressive kind of skin cancer. Celdaz 500 Injection sticks to the genetic code, called DNA,of the cancer cells and kills them . It also prevents their growth and further spread. This helps to treat the cancer.