Exam 3 chapter 18 Flashcards
breasts lie anterior to which structures
pectoralis major and serratus anterior muscles
breasts are located between which ribs
2nd and 6th ribs
extending from side of the sternum to the midaxillary
tail of spence
superior lateral corner projects up and laterally into axilla
what surrounds the nipples
areola
Montgomery’s glands
small elevated sebaceous glands that secrete protective lipid material during lactation
Name the structures
1: Axillary tail of spence
2: adipose tissue
3: serratus anterior muscle
4: pectoralis major
5: montgomery glands
6: nipple
7: areola
Breast is composed what types of tissue
Glandular tissue
fibrous tissue including suspensory ligaments
adipose tissue
What are Cooper’s ligaments?
fibrous bands extending vertically from surface to attach on chest wall muscles
what is embedded in adipose tissue
lobes
how are the breasts divided
4 quadrants
which quadrant is the site of most breast tumors
outer qudrand
what does glandular tissue contain
10-20 lobes radiating from nipple, and these are composed of lobules
what are the groups of axillary nodes
central axillary nodes
pectoral (anterior)
subscapular (posterior)
lateral
drainage from central axillary nodes goes where
infraclavicular and supraclavicular
Name the structures
- supraclavicular
- infraclavicular
- lateral axillary
- central axillary
- subscapular (posterior axillary)
- pectoral (anterior axillary)
what are epidermal ridges or “milk lines”
lines present during embryonic life that curve down from axilla to groin bilaterally
What are the only structures present at birth?
supernumerary nipple
occasionally persists and is visbile along track of mammray ridge
What hormone stimulates breast changes?
what is this stage called?
estrogen
puberty
Tanner staging
5 stages of breast development are included as levels of sexual maturity
What is thelarche?
breast budding
thelarche precededs menarche by how long
about 2 years
breast apprearance during inital growth
may be asymmetrical
one may grow faster than the other
during pregnancy when do breast changes start
2nd month, typically an early sign for most women
thick yellow fluid is a precursor for milk
contains protein and lactose but minimal fat
colostrum
when is colostrum produced
the first few days after delivery
how long after delivery is colostrum produced
few days
why is colostrum/breastfeeding important
it is rish in antibodies to protect the newborn against infection
when does lactation begin
1-3 days postpartum
why does the breastmilk appear white
from emulsified and cacium caseinate
stage of life when ovarian production of estrogen and progesterone is decreased causing breast atrophy
post-menopausal
changes related to aging women
breast atrophy may cause a breast lump to be present
lactiferous ducts are more palpable and fell firm and stringy
axillary hari decreases
male breasts
rudimentary structure consisting of a thin disk of undeveloped tissure underlying nipple
gynecomastia
during adolescence it is common for breast tissue to temporarily enlarge
usually unliateral and temporary, must reassure it is normal typically during puberty
may reappear in aging male due to testosterone deficiency
what genes should be assessed for risk of breast cancer
BRCA1 and BRCA2 mutation