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 percentage of free PSA is lower in men who have prostate cancer than in men who do not. This test is sometimes used to help decide if you should have a prostate biopsy if your PSA results are in the borderline range (like between 4 and 10).A lower percent-free PSA means that your likelihood of having prostate cancer is higher and you should probably have a biopsy.hen prostate cancer develops, the PSA level usually goes above 4. Still, a level below 4 does not guarantee that a man doesnât have cancer â about 15% of men with a PSA below 4 will have prostate cancer on a biopsy. Men with a PSA level between 4 and 10 have about a 1 in 4 chance of having prostate cancer.