Lecture 12 Normal Anatomy of the Breast

Question 1

During the development of the breast when do the mammary crests or ridges appear

Answer 1

4th week

Question 2

What is the vertical location of the breasts

Answer 2

2nd/3rd rib-6th rib

Question 3

What is the transverse location of breasts

Answer 3

Sternal edge to midaxillary line

Question 4

Where does the breasts lie

Answer 4

On the deep pectoral fascia

Question 5

What is the axillary tail (of spence) or process

Answer 5

Small part of breast that extends towards axillary fossa in the super-lateral quadrant

Question 6

The breasts are attached to the dermis by____

Answer 6

Suspensory ligament of Cooper

Question 7

Each breast contain ___lobules of glandular tissue (parenchyma)

Answer 7

15-20

Question 8

Each lobule in the breast are drained by a ______

Answer 8

Lactiferous duct

Question 9

The dilated portion of a lactiferous duct is called a_____

Answer 9

Lactiferous sinus

Question 10

Define Polymastia

Answer 10

An extra breast

Question 11

Define Polythelia

Answer 11

An extra nipple

Question 12

Define Athelia or Amastia

Answer 12

Absence of nipple or breast

Question 13

What is the breast blood supply

Answer 13

Axillary artery
Internal thoracic arteries 
Intercostal arteries:
-	Thoraco acromial artery
-	Lateral thoracic artery
-	Internal mammary (thoracic) artery

Question 14

What is the innervation of the breast

Answer 14

Anterior and lateral cutaneous branches of the 4-6th intercostal nerves

Question 15

What are sentinel lymph node

Answer 15

First draining node

Question 16

What is the significance of sentinel lymph node

Answer 16

Lymphatic mapping and staging of patients

Radiolabelled colloid is used