my husband PSA is 7.3 . had a biopsy a week ago, which showed no cancer, same thing 7 yrs ago. He has 5 noduals, which were there 7 yrs ago. His doctor his going to send samples out for a polaris test, what will this test tell him that the other one didn t, and why didn t yhey they do it to begin with. My husband is 71. His PSA went back down 7 yrs ago three mouths after biopsy, then shot back up last mouth.