The prostate gland surrounds the urethra below the bladder. The prostate gland steadily increases in size as men get older, a process known as benign prostatic hyperplasia (BPH). This can result in difficulty emptying the bladder, making treatment necessary. A distinction must be made between prostate carcinoma and BPH. BPH is the most common malignant disease in men, usually does not cause any symptoms, and is normally diagnosed as part of preventive care or as a result of a prostate enlargement diagnosis.