Diagnostic Ultrasound - Abdomen and Pelvis

Prostate
ZONAL ANATOMY OF THE PROSTATE
Anatomy: Pelvis
Anterior fibromuscular
stroma
Central zone
Pseudocapsule
Peripheral zone
Urethra
Transition zone
Peripheral zone
Ejaculatory ducts
Anterior fibromuscular
stroma
Urethra
Peripheral zone
Graphic depiction of the prostate with axial drawings of the zonal anatomy at 3 different levels is shown. The transition zone (in blue) is
anterolateral to the verumontanum. The central zone (in orange) surrounds the ejaculatory ducts, and encloses the periurethral glands
and the transition zone. It is conical in shape and extends downward to about the level of the verumontanum. The peripheral zone (in
green) surrounds the posterior aspect of the central zone in the upper 1/2 of the gland and the urethra in the lower half, below the
verumontanum. The prostatic pseudocapsule is a visible boundary between the central zone and peripheral zone. The anterior
fibromuscular stroma (in yellow) covers the anterior part of the gland and is thicker superiorly and thins inferiorly in the prostatic apex.
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