More than 1 million prostate biopsies are performed in the U.S. each year. Provenance errors (i.e. switching and contamination) in prostate cancer diagnosis occurs at a rate of 1.28%. Deepak A. Kapoor, MD and colleagues feel that the DNA test ensures that a prostate cancer diagnosis is given to the correct person. The DNA test “definitely rules out” these errors, said Dr. Kapoor. To read more about the value of DNA tests, click here. click here.