the nurse is caring for a client with significant benign prostatic hyperplasia (bph) and hydronephrosis who is fearful of having corrective surgery. which information is important for the nurse to convey? if not treated promptly, this condition may become cancerous. the obstruction is causing urine to flow backward and cause kidney dysfunction. medications which shrink prostate tissue will begin to work in a week or so. herbal preparations can be helpful and are free from side effects.