Benign prostatic hyperplasia (BPH) is a nonmalignant enlargement of the prostate. Symptoms related to BPH are one of the most common problems in older men. Histological evidence of BPH is found in more than is approximately 10% for men in their 30s, 20% for men in their 40s, reaches 50% to 60% for men in their 60s, and is 80% to 90% for men in their 70s and 80s. The majority of men over the age of 60 are considered to have urinary symptoms attributable to BPH.