Benign prostatic hyperplasia (BPH) or benign enlargement of the prostate (ICD-10 code – N40) is a chronic, progressive disease of the prostate, closely associated with the aging factor. It involves the enlargement of the gland primarily due to the increase in glandular or stromal components of the organ.
The disease is very common among elderly men and has an unfortunate trend of "becoming younger": it occurs in 10-20% of men under 40 years old and nearly 90% by the age of 80. On average, 20 out of 1000 men will consult a specialist about the symptoms of this disorder by the end of the year, although the actual prevalence of the disease is much higher.