This ppt tells about the anatomy of the breast and is a must to know questions for all medical students. Hope it helps you!

1. C
MAMMARY GLANDS-
PART OF PECTORAL
REGION

4. Introduction
o The breast is found in both the sexes, but rudimentary in male.
o Well developed in females after puberty.
o The breast is a modified sweat gland.
o Forms an important accessory organ of the female
reproductive system
o Functions – provides nutrition to the newborn in form of milk.

5. SITUATION
o The breast lies in the
 superficial fascia of the pectoral region.
o Divided into four quadrants
1. Upper medial (inner)
2. Upper lateral (outer)
3. Lower medial
4. Lower lateral
o Small extension of upper lateral quadrant
 AXILLARY TAIL OF SPENCE

6. Situation- cont.
oAxillary tale of spence
passes through an opening
– FORAMEN OF LANGER
(in deep fascia and lies in
axilla)

7. EXTENT
o VERTICALLY
- Extends from 2nd to 6th rib
o HORIZONTALLY
– Extends from lateral border
of sternum to mid-axillary
line

8. DEEP RELATIONS- MUSCLES
• The breast lies on the deep fascia (pectoral
fascia) that covers the Pectoralis major
• Deeper down , there are parts of 3 muscles:
1. Pectoralis major (upper 2/3rd )
2. Serratus Anterior ( lateral 1/3rd )
3. Oblique muscle of the Abdomen
• The breast is separated from the deep fascia by a
loose areolar tissue known as RETROMAMMARY
SPACE
 Allows the breast to move freely over
pectoralis major

9. STRUCTURE OF BREAST
1. THE SKIN
• Nipple
 conical projection that lies in the center of breast at the level
of the 4th intercostal space
 Has 15-20 lactiferous tubules
 Contains circular (stiff) and longitudinal (flattened) smooth
muscle
• Areola
 Skin surrounding the base of nipple which is pigmented.
 Rich in sebaceous glands
 Become enlarged and darkened during pregnancy to form
raised tubercles of Montgomery.