listen to jeff Marchi's advice - I echo that !! your husband's PSA of 6 retreating to 4 is a very good sign of just BHP or UTI problem responding nicely to antibiotic..IF his PSA ( schedule in 4-6 months) is back up, then MRI with contrast is next step...from what you have related, a biopsy is not needed at this juncture...remember doctors are like mechanics in a way..many are very good/ethical/compassionate..some are not good/comppetent/compassionate...find a new doc ASAP. ( btw, it is prostate - google it, learn about what it does, where it lives etc..!;=)