L1: Breast Anatomy

Question 1

Lie of Whole Breast

Answer 1

• Located within superficial fascia (between its anterior and posterior layers) of anterior chest wall

Question 2

Lie of Axillary Tail of Spence

Answer 2

Question 3

Axillary Tail of Spence can be mistaken for ……

Answer 3

Can be sometimes mistaken as enlarged lymph nodes or lipoma.

Question 4

Extent of Non-Lactating Breast

Answer 4

From 2-6 rib

• From lateral border of sternum to midaxillary line

Question 5

Extent of Lactating Breast

Answer 5

From the clavicle to 8th rib
- From midline to the anterior border of latissimus dorsi

Question 6

Def of Retromammary Space

Answer 6

Question 7

Importance of Retromammary Space

Answer 7

it has loose areolar C.T.
- which allow mobility of breast on chest wall

Question 8

Structure of Breast

Answer 8

Question 9

Orifices of The Nipple

Answer 9

The orifices of the lactiferous ducts lie near its apex

Question 9

Nipple is covered by …..

Answer 9

Thick wrinkled skin.

Question 10

Site of The Nipple

Answer 10

Lie at midclavicular line in 4th intercostals space

Question 11

Content of The Nipple

Answer 11

Smooth muscle fibers arranged concentrically & longitudinally

• (Thus, it is an erectile structure).

Question 12

Direction of The Nipple

Answer 12

• The nipple points forward & outwards &downwards

Question 13

Color of The Nipple

Answer 13

Question 14

Structure of The Areola

Answer 14

Question 15

Structure of The Areola

• Muscles

Answer 15

Involuntary muscles arranged in concentric rings & radially

Question 16

Structure of The Areola

• Glands

Answer 16

Question 17

Breast Parenchyma

• Lobes

Answer 17

Question 18

Breast Parenchyma

• Lactiferous Ducts

Answer 18

Question 19

Breast Parenchyma

• Duct System

Answer 19

Question 20

Functional Unit of Breast

Answer 20

terminal duct lobular unit (TDLU)

Question 21

Structure of Breast Stroma

Answer 21

Partly fibrous & partly fatty

Question 22

Def of Cooper’s Ligaments

Answer 22

It is a fibrous thickening of supportive connective tissue.

Question 23

Extent of Cooper’s Ligaments

Answer 23

from the deep layer of superficial fascia to the dermis

Question 24

Content of **Cooper's Ligaments**

Answer 24

contain blood vessels and lymphatics.

Question 25

Surgical Importance of **Cooper's Ligaments**

Answer 25

Question 26

Underlying Muscles of **Breast**

Answer 26

Question 27

Breast Changes in Pregnancy

Answer 27

- Mammary gland hypertrophy - Relative decrease volume of connective tissue & adipose tissue.

Question 28

The upper half of the breast, particularly the upper outer quadrant contains .......

Answer 28

- more glandular tissue than the remainder of the breast - So, Cancer breast more common in the upper outer quadrant

Question 29

Nerve Supply of **The Breast**

Answer 29

Question 30

Arterial Supply of **The Breast**

Answer 30

## Footnote OSCE Q: Branches of Acromiothoracic

Question 31

Arterial Supply of **The Breast** - Internal thoracic (mammary) artery

Answer 31

Question 32

Arterial Supply of **The Breast** - Branches of the axillary artery

Answer 32

Question 33

Arterial Supply of **The Breast** - Posterior Intercostal Arteries

Answer 33

Question 34

Arterial Supply of **The Breast** - Posterior intercostal arteries

Answer 34

Question 35

Venous Drainage of **The Breast**

Answer 35

Question 36

Venous Drainage of **The Breast** - Superficial Veins

Answer 36

Question 37

Venous Drainage of **The Breast** - Deep Veins

Answer 37

Question 38

Axillary LNs

Answer 38

Question 39

External mammary Nodes - Group - Name - Number - Site - relations - Afferent - Efferent

Answer 39

Question 40

Scapular Nodes - Group - Name - Number - Site - relations - Afferent - Efferent

Answer 40

Question 41

Axillary Vein Nodes - Group - Name - Number - Site - relations - Afferent - Efferent

Answer 41

Question 42

Central Nodes - Group - Name - Number - Site - relations - Afferent - Efferent

Answer 42

Question 43

Subclavicular Nodes - Group - Name - Number - Site - relations - Afferent - Efferent

Answer 43

Question 44

Interpectoral Nodes - Group - Name - Number - Site - relations - Afferent - Efferent

Answer 44

Question 45

The internal thoracic (mammary) Drainage

Answer 45

Question 46

Lymphatic vessels of **the Breast**

Answer 46

Question 47

Surgical levels of LN

Answer 47

Question 48

**Lymphatic Drainage of breast**

Answer 48

Question 49

**Lymphatic Drainage of breast** - Lymph Plexuses

Answer 49

Question 50

**Lymphatic Drainage of breast** - Drain deep parenchyma passes to .......

Answer 50

Question 51

**Lymphatic Drainage of breast** - 75% into ......

Answer 51

Question 52

**Lymphatic Drainage of breast** - 25% drains into .....

Answer 52

Question 53

Microscopic Anatomy of **The Breast**

Answer 53

Question 54

Microscopic Anatomy of **The Breast** - Lobes

Answer 54

Question 55

Microscopic Anatomy of **The Breast** - TDLU

Answer 55

Question 56

Def of **TDLU**

Answer 56

The functional Unit of the Breast

Question 57

Func. & Significance of **TDLU**

Answer 57

- Responsible For All Breast Diseases (Except Duct papilloma & Duct Ectasia) " As it the part most affected by hormones"

Question 58

Structure of **TDLU**

Answer 58

Lobule + Extralobular Terminal Duct

Question 59

Microscopic Anatomy of **The Breast** - Duct System

Answer 59