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.
Thread: Prostate Cancer Biopsy Negative. Prostate Cancer Biopsy Negative I was diagnosed with prostate cancer in January 2012. Since I am relatively young to have had this disease, age 55, urologists suggested robotic surgery to remove my prostate; alternatively, I could watch and wait since the cancer had not advanced very far at that point.