增生的前列腺不仅侧叶增大，中叶也增大，并且阻塞了尿道前列腺部。从膀胱壁粘膜表面明显的小梁形成可以看出阻塞使膀胱肥大。伴有尿液郁积的阻塞还能导致黄褐色的结石（石头）形成。
The enlarged prostate gland seen here not only has enlarged lateral lobes, but also a greatly enlarged median lobe that obstructs the prostatic urethra. This led to obstruction with bladder hypertrophy, as evidenced by the prominent trabeculation of the bladder wall seen here from the mucosal surface. Obstruction with stasis also led to the formation of the yellow-brown calculus (stone).
