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 Prostate Cancer Biopsy Procedure. 1  The prostate biopsy is the taking of tissue samples from the prostate gland and examining them underneath a microscope for cell differentiation. 2  Before the Prostate Biopsy. 3  Types of Prostate Biopsies. There are three types of prostate biopsies: the transrectal, the transurethral, and the transperineal. The transrectal prostate biopsy is guided by the transrectal ultrasound (TRUS) through the anus and into the rectum.