A prostate biopsy is a procedure to remove samples of suspicious tissue from the prostate. The prostate is a small, walnut-shaped gland in males that produces fluid that nourishes and transports sperm. During a prostate biopsy a needle is used to collect a number of tissue samples from your prostate gland.

A kidney biopsy is a procedure in which a health care professional takes one or more tiny pieces of tissue from your kidney. A pathologist examines the tissue samples under a microscope for signs of damage or disease. Why do health care professionals use kidney biopsy?

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Biomarker testing is a way to look for genes, proteins, and other substances (called biomarkers or tumor markers) that can provide information about cancer. Each person’s cancer has a unique pattern of biomarkers. Some biomarkers affect how certain cancer treatments work.