Benign prostatic hyperplasia first develops in the
Benign prostatic hyperplasia arises from submucosal glands of periurethral transitional zone with stromal proliferation and adenosis forming a nodular enlargement. It eventually compresses the peripheral zone glands into a false capsule and causes the appearance of typical 'lateral' lobes. Reference : page1345 Bailey and Love's sho practice of surgery 25th edition
Periurethral transition zone
Peripheral zone
Central zone
Anterior fibromuscular stroma
Urology