The actual cause of prostate enlargement is unknown. Factors linked to aging and the testicles themselves may play a role in the growth of the gland. Men who have had their testicles removed at a young age (for example, as a result of testicular cancer) do not develop BPH.
Similarly, if the testicles are removed after a man develops BPH, the prostate begins to shrink in size.
Some facts about prostate enlargement:
- The likelihood of developing an enlarged prostate increases with age.
- BPH is so common that it has been said all men will have an enlarged prostate if they live long enough.
- A small amount of prostate enlargement is present in many men over age 40 and more than 90% of men over age 80.
- No risk factors have been identified other than having normally functioning testicles.