what hormone triggers the breast to develop into its mature lobulated form?
progesterone influences formation of lobules
how do the breasts change during the monthly cycle?
they enlarge slightly during menstrual cycle due to water retention
what are breasts mainly composed of?
how does breast tissue change during pregnancy?
proliferation of ductal system and lobules
what are the changes that happen to the breast during menopause?
glandular tissue atrophies and breast becomes mainly composed of fatty tissue and ducts become ectatic
what is the % of fat to age after menopause?
age 50--40% fat, age 60--50% fat, age 80--100% fat
how does HRT affect natural aging process of breasts?
it delays involution of breast tissue
what are the three steps for routine breast cancer screening?
monthly self exam, regular clinical breast exams, screening mammography
what are the two main indications for breast us?
diagnostic and interventional imaging
what are some of the methods for describing breast lesion location?
4 quadrants UI, UO, LI, LO----clock face radial: 3, 6, 9 oclock etc-----123 method of 1 near the nipple, 2 mid circle around, 3 outer circle around nipple----ABC method with A closest to nipple, B mid, C closest to chest wall
what position is CC in mammo
superior to inferior compression of the breast--equal to trv scan plane
where is the marker in a CC mammo?
at the lateral border of the breast of interest
how is lesion position described in a CC mammo?
as lateral or medial to the nipple
what is MLO in mammo?
medial to lateral compression of breast tissue from 30 to 60 degree oblique
how is the lesion location described in MLO mammo?
as superior or inferior to nipple
lesions found to be medial in CC mammo will appear____on MLO
lesions found to be lateral on CC view will appear____in MLO
what is MULD?
medial up, lateral down
lesions found in mammo must be: c
correlated in size, shape, density, position, and appearance in sonography