An enlarged prostate gland compresses the urethra, causing problems with urination. Prostate enlargement is caused by prostate gland overgrowth (benign prostatic hypertrophy or hyperplasia) or in some cases, prostate cancer.
Update Date 10/2/2013
Updated by: Scott Miller, MD, Urologist in private practice in Atlanta, Georgia. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.