Prostate Gland, Seminal vesicle

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Prostate Gland,Seminal vesicleEjaculatory
Ducts

• Dr. Sama-ul-Haque

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Objectives

• Discuss the site, size and relation of prostate.
• Describe the fasciae covering and related to the
  prostate (true and false capsules).
• Describe its anatomical and surgical lobes.
• Discuss its blood, nerve supply and lymphatic
  drainage.
• Compare between the site of enlargement of the
  prostate in senile prostatic hyperplasia and
  cancer prostate.

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Objectives

• Define the seminal vesicle.
• Discuss its site, relation, blood and nerve
  supply.
• Discuss its lymphatic drainage.
• Define the ejaculatory duct.
• Describe its site, beginning and termination.

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Prostate Gland

• Fibromuscular glandular organ
• Glandular part 2/3rd
• Fibromuscular part 1/3rd
• Site
• Lies between the neck of the urinary
• bladder above and the urogenital
• diaphragm below
• Size
• 1.25 inches (3 cm)

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Prostate Gland

• Relations
• Superiorly
• Neck of the urinary bladder
• Urethra enters the center of the base of the
  prostate
• Inferiorly
• Urogenital Diaphragm
• Urethra leaves prostate just above its apex on
  the anterior surface

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Location of Prostate Gland
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Prostate Gland

• Relations
• Anteriorly
• Symphysis pubis
• Puboprostatic ligaments (Pubic bones)
• Posteriorly
• Rectal Ampulla
• Fascia of Denonvillier
• (Rectoprostatic fascia)
• Laterally
• Levator Ani

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Capsule of the Prostate Gland

• True capsule
• Prostate is surrounded by a fibrous capsule
  which contains prostatic plexuses of nerves
• and veins
• False capsule
• Visceral layer of pelvic fascia forms a fibrous
  prostatic sheath outside the true capsule

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Prostate Gland

• Apex
• Base
• Anterior surface
• Posterior surface
• Inferolateral surfaces

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Anatomical lobes of Prostate Gland

• 1. Anterior lobe
• Lies in front of urethra
• Muscular
• Devoid of glandular tissue
• 2. Median or Middle lobe
• Lies between urethra and the ejaculatory ducts
• Glandular

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Anatomical lobes of Prostate Gland

• 3. Posterior lobe
• Lies behind urethra and below ejaculatory ducts
• Glandular
• 4. Right lateral lobe
• Lies on the side of the urethra
• Glandular
• 5. Left lateral lobe
• Lies on the side of the urethra
• Glandular

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Blood supply of Prostate Gland

• Arterial supply
• Branches of Internal Iliac artery
• Branches from inferior vesical artery
• Branches from middle rectal artery
• Branches from Internal pudendal artery
• Venous drainage
• Veins form prostatic plexus
• Drain into internal iliac vein

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Lymphatic drainage Nerve supply of Prostate
Gland

• Lymphatic drainage
• Internal iliac nodes
• Nerve supply
• Inferior hypogastric plexus

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Benign Prostatic Hypertrophy (BPH)

• Occurs in middle age
• Median or Middle lobe is involved
• Projects into urinary bladder
• Obstructs prostatic urethra and internal urethral
  orifice

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Prostatic Cancer

• Occurs in old age (after 55 years usually)
• Posterior and lateral lobes are involved
• Palpated during PR examination
• Can spread to iliac and sacral lymph nodes and
  can spread to vertebral column and brain through
  venous channels

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• Prostatectomy
• TURP (Transurethral resection of prostate)

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Seminal vesicles

• Lobulated organ
• 2 inches (5 cm) long
• Lies on the posterior surface of the urinary
  bladder
• Seminal vesicle joins the vas deferens to form
  ejaculatory ducts on each side

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Blood supply of Seminal vesicles

• Arterial supply
• Branches from inferior vesical artery
• Branches from middle rectal artery
• Venous drainage
• Drain into internal iliac vein
• Lymphatic drainage
• Internal iliac nodes

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Ejaculatory ducts

• Less then 1 inches (2.5 cm) long
• Formed by the union of duct of seminal vesicle
  and vas deferens
• Pierce posterior surface of the prostate
• Opens into the prostatic part of the urethra

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Thank You