Melanoma: The most dangerous form of skin cancer, a malignancy of the melanocyte, the cell that produces pigment in the skin.
Statistically, the probability of having a prostate cancer present with a PSA of between 4 and 10 is around 22 per cent. Once the PSA level rises above 10, the probability goes up to the order of 64 per cent.
PSA and digital rectal exams are generally done yearly for men ages 50 to 70, or until life expectancy is 10 years or fewer since prostate cancer grows slowly. SPECIAL: The One Thing You Should Do for Your Prostate Every Morning. When considering a prostate exam at a certain age, men should factor in possible risks. African-Americans have a higher risk of developing prostate cancer and dying from it, the Mayo Clinic notes.