1 Prostate Gland, Seminal vesicle & Ejaculatory Ducts Dr. Sama-ul-Haque
2 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.
3 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.
4 Prostate Gland Fibromuscular glandular organ Site: Glandular part : 2/3rdFibromuscular part: 1/3rdSite:Lies between the neck of the urinarybladder above and the urogenitaldiaphragm belowSize:1.25 inches (3 cm)
5 Prostate Gland Relations: Superiorly: Neck of the urinary bladder Urethra enters the center of the base of the prostateInferiorly:Urogenital DiaphragmUrethra leaves prostate just above its apex on the anterior surface
9 Capsule of the Prostate Gland True capsule:Prostate is surrounded by a fibrous capsule which contains prostatic plexuses of nervesand veinsFalse capsule:Visceral layer of pelvic fascia forms a fibrous prostatic sheath outside the true capsule
12 Anatomical lobes of Prostate Gland 1. Anterior lobeLies in front of urethraMuscularDevoid of glandular tissue2. Median or Middle lobeLies between urethra and the ejaculatory ductsGlandular
13 Anatomical lobes of Prostate Gland 3. Posterior lobeLies behind urethra and below ejaculatory ductsGlandular4. Right lateral lobeLies on the side of the urethra5. Left lateral lobe
14 Blood supply of Prostate Gland Arterial supply:Branches of Internal Iliac arteryBranches from inferior vesical arteryBranches from middle rectal arteryBranches from Internal pudendal arteryVenous drainageVeins form prostatic plexusDrain into internal iliac vein
20 Benign Prostatic Hypertrophy (BPH) Occurs in middle ageMedian or Middle lobe is involvedProjects into urinary bladderObstructs prostatic urethra and internal urethral orifice
21 Prostatic Cancer Occurs in old age (after 55 years usually) Posterior and lateral lobes are involvedPalpated during PR examinationCan spread to iliac and sacral lymph nodes and can spread to vertebral column and brain through venous channels
22 ProstatectomyTURP (Transurethral resection of prostate)
23 Seminal vesicles Lobulated organ 2 inches (5 cm) long Lies on the posterior surface of the urinary bladderSeminal vesicle joins the vas deferens to form ejaculatory ducts on each side
24 Blood supply of Seminal vesicles Arterial supplyBranches from inferior vesical arteryBranches from middle rectal arteryVenous drainageDrain into internal iliac veinLymphatic drainageInternal iliac nodes
26 Ejaculatory ducts Less then 1 inches (2.5 cm) long Formed by the union of duct of seminal vesicle and vas deferensPierce posterior surface of the prostateOpens into the prostatic part of the urethra