A 70-year-old man undergoes a routine screening with a prostate-specific antigen (PSA) test, which returns elevated at 8 ng/mL (normal <4 ng/mL). Digital rectal examination (DRE) is normal. His urologist recommends further evaluation due to the elevated PSA. The patient has no urinary symptoms or family history of prostate cancer. What is the next best step in the diagnostic workup for this patient?
