Benign Prostatic hyperophy results in obstruction of the urinary tract. The specific condition is associated with enlargement of the:
Median lobe of prostate is prone to development of BPH. Posterior lobe of prostate is prone to development of malignancy. Ref: Snell's Clinical Anatomy, 7th Edition, Page 381
Entire prostate gland
Lateral lobes
Median lobe
Posterior lobes