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=== Arterial Supply === * The blood supply to the prostate enters at the 4 and 8 o'clock positions. * '''The prostate receives arterial blood supply from the inferior vesical artery, which is a branch of the anterior branch of the internal iliac artery''' ** After '''the inferior vesical artery''' provides small branches to the seminal vesicle and the base of the bladder and prostate, the artery '''terminates in 2 large groups of prostatic vessels:''' *** '''Urethral vessels''' **** Enter the prostate at the posterolateral vesicoprostatic junction and supply the vesical neck and periurethral portion of the gland. *** '''Capsular branches''' **** Run along the pelvic sidewall in the lateral pelvic fascia posterolateral to the prostate, providing branches that course ventrally and dorsally to supply the outer portion of the prostate. **** '''These capsular arteries and veins are intimately associated with the branches of the pelvic plexus forming the neurovascular bundle (NVB),''' which is used as the macroscopic landmark to aid in the identification of the microscopic branches of these nerves. * Branches from the internal pudendal artery and the middle rectal (hemorrhoidal) artery also contribute a supply to the prostate
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