Prostate Gland,Prostate Gland,Seminal vesicleSeminal vesicle

&&Ejaculatory DuctsEjaculatory Ducts

Dr. Sama-ul-Dr. Sama-ul-HaqueHaque

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.

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.

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)

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

Location of Prostate Gland

Prostate Gland Relations:

Anteriorly: Symphysis pubis Puboprostatic ligaments (Pubic bones)

Posteriorly: Rectal Ampulla Fascia of Denonvillier

(Rectoprostatic fascia)

Laterally: Levator Ani

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

Prostate Gland Apex

Base

Anterior surface

Posterior surface

Inferolateral surfaces

Anatomical lobes of Prostate Gland1. 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

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

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

Lymphatic drainage & Nerve supply of Prostate Gland

Lymphatic drainage Internal iliac nodes

Nerve supply Inferior hypogastric plexus

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

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

Prostatectomy

TURP (Transurethral resection of prostate)

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

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

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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