breast Flashcards
Describe the common developmental abnormalities of the breast Define acute mastitis and list the common causes Describe fibrocystic changes (including important clinical associations) Describe the clinicopathologic features of intraductal papilloma, fibroadenoma, and phyllodes tumor List the risk factors for breast cancer development Describe ductal carcinoma in situ Describe and be able to identify mammary Paget's disease and inflammatory carcinoma Compare and contrast the 2 subtypes of
causes of acute mastitis
cracks in skin or stasis in milk may allow direct or retrograde ductal spread of bacteria
most common cause of bloody nipple discharge
intraductal papilloma
most common tumor in adolescent and young adults
fibroadenoma
main risk factor for breast cancer
age, 1st degree FMX, estrogen exposure, radiation, obestity
worst BRCA mutation
BRCA1
US lifetime risk of breast cancer
11%
syndromes that can lead to risk of breast cancer
li-fraumeni, cowden (PTEN)
comedo type necrosis
grade III carcinoma in situ
100% of pts with this will have DCIS
paget’s disease of the nipple
35-50% of pts with this will have invasive carcinoma
paget’s dx of the nipple
signs of invasive breast cancer
lump
firm, non-movable lump
diffuse thickening in breast texture
eczema like changes
small uniform round of oval nuclei in single file pattern infiltrating the stroma
onvasive lobular carcinoma
orange peel skin
inflammatory carcinoma
staging with direct extention to chest wall
T4
staging of ANY distant mets
M1
met to any internal mammary node
N3
importance of congenital inversion of the nipple
similar changes can be produced by underlining cancer
arises from cystic dilation of an obstructed duct
galactocele
benign cyst formation and fibrosis of the breast
fibrocystic changes
brown to blue cysts filled with watery fluid
fibrocystic changes
duct lumen filled with heterogeneous population of cells of difereing morphology with fenestrations
epithelial hyperplasia
benign processes at higher risk for invasive breast carcinoma
atypical ductal and lobar hyperplasia
proliferation of lumial spaces lined with epithelial cells and myepithelial cells yielding masses of small glands within a fibrois stroma
sclerosing adenosis
swirling pattern of cells with a well-circumscribed border
sclerosing adenosis
benign processes with small risk of breast carcinoma
fibrosis, cystic changes, apocrine metaplasia
carcinoma risk of sclerosing adenosis
slightly higher
bugs causing acute mastitis
Staph A, S pyogenes
inflamatory breast lesion sometimes preceded by trauma
fat necrosis
prominent lymphoplasmacytic infiltrate and occasiional granulomas in the periductal stroma
mammary duct ectasia
solitary discrete mobile mass
fibroademoma
rubbery well-circumcribed mass
fibroadenoma
leaf-like epithelium projections in beign tumors
phyllodes tumor
serous or bloody nipple discharge with a small subareolar tumor in a premenopausal woman
intraductal papilloma
< 1 cm tumor with delicate branching growths within a dilated duct with double layered epithelium
intraductal papilloma
histological way to differentiate intraductal papilloma from carcinoma
precense of double layered epithelium
most common genetic breast cancer mutation
HER2/NUE
genetic marker in breast cancer associated with poor outcomes
HER2/NUE
4 types of breast cancer molecular subtypes
HER2/NUE + estrogen receptor +
HER2/NUE + estrogen receptor -
HER2/NUE - estrogen receptor +
HER2/NUE - estrogen receptor -
common non-breast primary cancer in women with breast cancer
ovarian
most common location of breast cancer
upper outer quadrant
calcifications are frequently associated with
DCIS
two types noninvasive breast cancer
ductal/lobular cancer in situ
DCIS prognosis
excellent
extention of DCIS into the nipple
paget’s disease of the nipple
bland round nuclei occuring in loosely cohesive clusters within lobules
LCIS
in situ carinoma with the highest risk of invasive disease
LCIS
marker of increased risk of invasive cancer of either breast
LCIS
replaces normal breast fat with tumor cells and forms a hard palpaple mass
invasive ductal carcinoma
single-file chains of tumor cells invading into the stroma
invasive lobular carcinoma
met to CSF, serosal surfaces, GI, ovary, uterus and bone marrow
invasive lobular carcinoma
usually hormone +/ HER2/NEU -
invasive lobular carcinoma,
enlarged, swolled, warm breast usually without palpable mass
inflammatory carcinoma
reason imflammatory carcinoma looks that was
invades dermal lymphatic spaces
can often be mistaken for fibroadenomas
medullary carcinomas
“triple-negative” breast cancer
medullary carcinomas
first outward sign of breast malinancy
retraction or dimpling of the nipple
sign of involvement of the breast lymphatics
peau d/orange
outer quadrants and centrally located cancers spread to
axillary nodes
inner quadrants cancers spread to
nodes along internal mammilary arteries
most common mets in breast cancer
lungs, bones, liver, adrenals
better progress cancer types
tubular, medullary, mucinous
worst type of breast cancer
inflammatory
frequent cause of angiosarcoma
previous breast radiation therapy
expression of estrogen and progesterone is (good/bad)
good
expression of HER2/NEU is (good/bad)
bad
drug thats use is based on HER2/NEU profile
trastuzumab
most important cause of hyperestrtinism in males
liver cirrhosis