Prostate (dave's notes)

Question 1

What is the shape and the dimensions of the prostate?

Answer 1

4x3x2cm, usually broader than long

Question 2

What does the prostate secrete?

Answer 2

Approximately 30% of the seminal fluid

Question 3

What are the relations of the prostate as a whole?

Answer 3

The prostate lies between the bladder and the urogenital diaphragm, clasped by levator ani

Question 4

What are the relations of the base of the prostate?

Answer 4

The upper surface is adjacent to the bladder and is fused with the neck

Question 5

What are the relations of the apex of the prostate?

Answer 5

The apex is blunt and is the lowest part. The prostatic urethra becomes the membranous urethra upon emergence

Question 6

What are the anterior relations of the prostate?

Answer 6

The back of the retropubic space, connected by puboprostatic ligaments

Question 7

What are the relations of the inferolateral surfaces of the prostate?

Answer 7

The inferolateral surfaces of the prostate are clasped by the levator prostatae parts of levator ani.

Question 8

What occurs at the posterior surface of the prostate?

Answer 8

The ejaculatory ducts are accepted, as are the prostate’s own ducts

Question 9

What contains the prostate?

Answer 9

An inner “true” capsule and a condensation of outer “false” capsular ligaments

Question 10

What lies between the inner capsule and outer capsular ligaments?

Answer 10

A venous plexus

Question 11

What are the five lobes of the prostate?

Answer 11

Anterior, middle, posterior, and left and right lateral lobes

Question 12

What is the significance of the anterior prostate lobe?

Answer 12

It is functionally unimportant

Question 13

What is the significance of the middle prostate lobe?

Answer 13

Ducts pass through this lobe. Enlargements cause obstruction.

Question 14

Why are the posterior and lateral lobes of the prostate important?

Answer 14

For their simple enlargement and cancerous change.

Question 15

Describe the prostatic urethra

Answer 15

It is the widest part (?of the urethra?), has a posterior urethral crest, with a seminal colliculus (//uterus)

Question 16

Where do the ejaculatory ducts open?

Answer 16

On the sulcus and crest of the prostatic urethra

Question 17

What is the blood supply of the prostate?

Answer 17

By the prostatic branch of the inferior vesical artery (plus middle rectal and internal pudendal).

Question 18

What is the venous drainage of the prostate?

Answer 18

A venous plexus lies between the two capsules and receives the deep dorsal vein of the penis.

Question 19

Describe the lymphatic drainage of the prostate

Answer 19

Lymph drainage passes across the pelvic floor to II (??) and sacral nodes. Some may reach external iliac nodes.

Question 20

What is the nerve supply of the prostate?

Answer 20

Sympathetic and parasympathetic. Parasympathetic nerves supply the acini (from pelvic splanchnic plexus). Sympathetic fibres supply the muscular stroma which contract to empty the glands during ejaculation (IHP)

Question 21

From what does the prostate develop?

Answer 21

From the UGS forming lateral epithelial buds (acini of the outer zone) and dorsal buds (acini of the inner zone).