Breast Pathology Flashcards
What are the two layers of cells in the breast?
luminal
myoepithelial
What drug is used to treat mastitis?
Dicloxacillin
What is periductal mastitis?
inflammation of the subareolar ducts
In what patient population is periductal mastitis usually seen?
smokers
What causes periductal mastitis?
lack of vitamin A
What is mammary duct ectasia?
inflammation with dilation of subareolar ducts
What is the high yield mechanism of how mammary duct ectasia often presents?
green/brown discharge
What type of patient with mammary duct ectasia likely arise in?
Multiparous postmenopausal woman
Presence of what type of cell on biopsy would confirm mammary duct ectasia?
Plasma
How does intraductal papilloma clasically present? Pre or postmenopausal?
bloody nipple discharge
premenopausal
Which cells are contained within a Intraductal Papilloma?
epithelial
myoepithelial
Which cells are contained within a Papillary Carcinoma?
epithelial
What two types of tissues are contained within a fibroadenoma?
fibrous and glandular
Are fibroadenomas seen more often in pre or post?
Premenopausal
Does a fibroadenoma have an increased risk for transforming into a carcinoma?
no
What is a phyllodes tumor?
fibroadenoma with fibrous overgrowth
Are Phyllodes tumors more often seen in premenopausal or postmenopausal women?
Post
What is seen on histology during a Phyllodes tumor?
‘leaf-like’ projections
How is DCIS often detected on mammography?
calcifications
What is Pagets disease of breast?
DCIS that has extended out of the nipple
What is invasive ductal carcinoma?
DCIS that has invaded basement membrane
What cell is lacking in a tubular carcinoma?
myoepithelial
What is the prognosis of Tubular Carcinoma?
good
Does mucinous carcinoma occur in young women or old women?
old women
What is the prognosis or mucinous carcinoma?
good
What cells are present during a Medullary Carcinoma?
Lymphocytes and plasma cells
Which type of breast cancer is BRCA1 associated with?
medullary
What is inflammatory carcinoma characterized by?
carcinoma in dermal lymphatics
What can Inflammatory Carcinoma be confused with?
mastitis
What is the prognosis for inflammatory carcinoma?
poor
What type of breast cancer lacks E-Cadherin?
lobular carcinoma in situ
What is the Tx for LCIS?
tamoxifen
On histology, could could LCIS be distinguished from Invasive Lobular Carcinoma?
Invasive Lobular Carcinoma = signet rings
Which population has an increased incidence to develop triple negative breast cancer?
african american women
What cancers are BRCA1 associated with?
breast and ovarian carcinoma
What cancers are BRCA2 associated with?
male breast cancer
Where does male breast cancer present?
subareolar mass
Where is the highest density of breast tissue for males?
under the nipple
What is the most common type of male breast cancer?
invasive ductal carcinoma
Other than BRCA2, what genetic condition could lead to male breast cancer?
Klinefelters syndrome
The breast is a modified what type of gland?
sweat
What structure is the breast embryologically derived from?
skin
Which quadrant contains the most amount of breast tissue?
upper/outer
Which two parts of the breast tissue are lined by two types of epithelium?
ducts and lobules
Which two types of fibrocystic changes have have a 2x increase in breast cancer?
sclerosing adenosis
ductal hyperplasia
Which type of fibrocystic changes have have a 5x increase in breast cancer?
Atypical hyperplasia
Does Intraductal Papilloma have underlying epithelial and myoepithelial cells?
yes
Does Papillary Carcinoma of the breast have underlying epithelial and myoepithelial cells?
no
Which breast pathology can present with a Blue Dome appearance?
Fibrocystic Change
Which two benign breast conditions can present with microcalcifications?
sclerosing adenosis
fat necrosis
What type of carcinoma is Desmoplastic Stroma indicative of?
invasive ductal carcinoma
What breast cancer presents with cells in ‘single-file’?
invasive lobular carcinoma
How does male breast cancer present?
subareolar mass
Can Galactorrhea be caused by Nipple Stimulation?
yes
What type of metaplasia takes place during Periductal Mastitis?
squamous
What happens to the terminal duct during Periductal Mastitis?
blockage
With what two ways does Periductal Mastitis present?
nipple retraction
subareolar masss
Presence of what type of cell on biopsy would confirm fat necrosis of breast?
giant cell
Where do Fibrocystic Changes of the breast most often present?
upper/outer quadrant
Does Apocrine Metaplasia during Fibrocystic Changes carry an increased risk of cancer?
no
Which benign fibrocystic change can present with calcifications?
sclerosing adenosis
Of the fibrocystic changes that increase risk of breast cancer, which breast cancer is it?
invasive carcinoma
Of the fibrocystic changes that increase risk of breast cancer, is the risk for unilateral or bilateral breasts?
bilateral
Which breast cancer can present with bloody nipple discharge?
papillary carcinoma
Does Papillary Carcinoma of the Breast present in pre or postmenopausal womens?
post
Does DCIS produce a mass?
no
What are two histological characteristics of the Comedo type of DCIS?
necrosis
dystrophic calcifications
Is Lobular Carcinoma unilateral or bilateral?
bilateral
What happens to the HER2/Neu gene during breast cancer?
amplification