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.
There are over one million prostate cancer tissue biopsy procedures performed annually in the U.S. Approximately 25 percent of these tissue biopsies are reported positive, indicating the presence of prostate cancer.