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.
The likelihood of prostate cancer unrecognized during initial biopsy. Aggregate data on the number of prostate biopsies performed in the United States are incomplete, but it is often stated that more than one million are performed annually.