5. BREAST
Introduction:
• Breasts are specialized accessory glands
• Secrete milk
• Present in both sexes
• Similar in males and immature females
6. Anatomy of Breast
• Has nipples
• Surrounded by a colored area of skin
“Areola”
• Consist of a system of ducts embedded in
connective tissue
7. At Puberty
• Gradually enlarge
• Assume their hemispherical shape
• Under the influence of ovarian hormones
• The ducts elongate in size
8. Extension
• Base extends from 2nd to the 6th ribs
• From lateral margin of sternum to
midaxillary line
• Greater part of a gland lies in superficial
fascia
9. Axillary Tail
• Extends upward and laterally
• Pierces the deep fascia at the lower
border of pectoralis major muscle
• Then enters the axilla
10.
11.
12. Formation
• Each breast consists of 15-20 lobes which
radiate out from the nipple
• The main duct from each lobe opens
separately on the summit of the nipple
called Ampulla
• Base of nipple is surrounded by AREOLA
• Tiny tubercles on the areola produced by
the underlying areolar glands
13.
14. Fibrous Septa
• Lobes of the glands are separated by
fibrous septa
• Are well developed in the upper part of the
gland
• Extend from skin to the deep fascia
• Serve as a suspensory ligament
15. Retromammary Space
These are the connective tissues which
separate the breasts from the deep fascia
covering the underlying muscles
16. Young & Old
• Breasts tend to protrude forward from a
circular base in young women
• They tend to be pendulous in older women
• They reach their maximum size during
lactation
17. Blood Supply
• Perforating branches of the internal
thoracic artery and the intercostal arteries
• Axillary artery via lateral thoracic and
thoracoacromial branches
18.
19. Lymph Drainage
• Important clinically because of frequent
development of a cancer
• Subsequent dissemination of the
malignant cells along the lymph vessels to
the lymph nodes
