benign prostatic hyperplasia n adenomatous hyperplasia of the periurethral part of the prostate gland that occurs esp. in men over 50 years old and that tends to obstruct urination by constricting the urethra abbr. BPH called also benign prostatic hypertrophy
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(BPH) age-associated enlargement of the prostate resulting from proliferation of both glandular and stromal elements, beginning generally in the fifth decade of life; it may cause urethral compression and obstruction. Called also benign prostatic hypertrophy and nodular hyperplasia of the prostate.Medical dictionary. 2011.