Normal Anatomy of the Breast Flashcards
The breast is present in what form in males?
Rudimentary form
The breast is a site of malignant change in how many women?
1 in 10
What are the functions of the breast?
Secondary sexual feature in females
Source of nutrition for the neonate
What kind of glands are breasts developed from?
Modified and highly specialised sweat glands
What is the breasts special capsule or sheath?
It doesnt have one
Breast size and shape depends on?
Genetic, racial, and dietary factors
The breast extends vertically between which ribs?
2nd or 3rd rib to 6th rib
The breast extends transverselly from where to where?
Sternal edge to midaxillary line
What is the location of the axillary tail (of spence) or process?
A small part of the breast that extends towards the axillary fossa
What fascia does the breast lie on?
Deep pectoral fascia
2/3rd of the breast rests on the pectoral fascia covering pectoralis major
1/3rd of the breast rests on the fascia covering serratus anterior
What bursa (space) helps the breast with some degree of movement?
Retromammary space (bursa)
The breast is firmly attached to the dermis by what?
What does this help do?
Suspensory ligament of cooper
Help support the lobules of the gland
What is the nipple and areola?
Nipple - prominence of the breast
Areola - Pigmented area around the nipple
Each breast contains how many lobules of glandular tissue (parenchyma)?
15-20
Each lobule is drained by what?
Lactiferous duct
opens independently on the nipple
WHat is the dilated portion of each duct called?
Lactiferous sinus
Describe the nipple:
Whats its surface like? What is it made of? Whats its position?
No fat or hair
Conatins collagenous dense connective tissue, elastic fibres and bands of smooth muscle
Position: variable or 4th intercostal space
THe tips of nipples are fissured with what?
Lactiferous ducts opening into them
What is the structure and function of the areola?
Skin covering the nipple and areola contains numerous sweat and sebaceous glands
Oily material secreted by the sebaceous glands provides a protective lubricant for nipple and areola
What happens to the areola during pregnancy?
Enlarge