PHE prostate is a complex structure consisting of tubular glands with connective tissue and unstriped muscle fibres, situated at the neck of the bladder a t the junction of the genital aiid urinary systems. As well as the true prostatic glands, there are in the region of the bladder neck groups of submucous glands placed under the trigone and ai-oiind the prostatic urethra. These glands arise developn~entally as buds from the urogenital sinus, appearing first in the 55 millimetre embryo. The prostate attains its normal size at puberty, thanks to the secretion of the interstitial cells of Leydig. With the onset of activity of the gerniinal epithelium, the development of the prostate ceases, and the normal gland remains statioiiary in size until the sixth decade, when, as the result of testicular atrophy, the secretion of the germinal

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