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Diagnostic Ultrasound - Abdomen and Pelvis

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Prostate<br />

SEMINAL VESICLES AND VAS DEFERENS<br />

Anatomy: <strong>Pelvis</strong><br />

Bladder<br />

Vas deferens<br />

Seminal vesicles<br />

Vas deferens<br />

Seminal vesicles<br />

Vas deferens<br />

Seminal vesicle<br />

Bladder<br />

Vas deferens<br />

Seminal vesicle<br />

Bladder<br />

Vas deferens<br />

Seminal vesicles<br />

Vas deferens<br />

Seminal vesicles<br />

(Top) Transverse transrectal ultrasound (TRUS) at the level of the seminal vesicles shows bilateral seminal vesicles <strong>and</strong> the vas deferens.<br />

(Middle) More inferior transverse TRUS shows convergence of the vas deferens <strong>and</strong> seminal vesicles just above the base of the prostate.<br />

(Bottom) Transverse TRUS shows the vas deferens converging with the seminal vesicles. Their union will form the ejaculatory ducts,<br />

which enter the prostate base <strong>and</strong> course within the prostate enclosed within the central zone. The ejaculatory ducts empty into the<br />

urethra at the verumontanum.<br />

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