Breast Cancer Flashcards
What are the RFs for breast cancer?
Age/gender
Endocrine factors
Genetic factors
Environmental and lifestyle factors
What are the endocrine RFs for breast cancer?
Early menarche (< age 12) and late menopause (> age 55)
Nulliparity and late initial pregnancy (after age 30)
HRT
What are genetic RFs for breast cancer?
Benign breast disease
Personal hx
FH
BRCA1/BRCA2 mutations: Increased lifetime risk of developing breast cancer
Other genes associated with hereditary breast cancer: TP53, CHK2, PTEN, ATM
What are the environmental and lifestyle RFs for breast cancer?
Obesity Lack of physical activity Alcohol use Prior ionizing radiation (before age 20) Long-term heavy smoking (particularly before 1st pregnancy)
What ages does the American cancer society make recommendations for breast cancer screening?
40-44 can get a yearly mammogram
45-54 should get a yearly mammogram
55+ can transition to every other year or continue annual mammograms
What does the USPSTF recommend for mammogram schedules?
Biennial for ages 50-74
What are considered high risk that would require more frequent screening?
h/o breast cancer
5-year risk 1.7+ in women > 35 yo
Lifetime risk > 20%
Known genetic predisposition
What is the clinical presentation of early stage breast cancer?
Typically no sx Hard painless lump Irregular and nonmobile Nipple discharge, pain, or inversion Dimpling/skin irritation
What type of sx may be associate with metastatic breast cancer?
Systemic sx
What are lobules?
Glands that produce breast milk
What do the ducts connect in the breasts?
Lobules to the nipples
What are the types of breast cancer?
Ductal Carcinoma In Situ
Lobular Carcinoma In Situ
Invasive Ductal Carcinoma
Invasive Lobular Carcinoma
What is the diagnosis of breast cancer?
History and physical CBC, plt, LFT, alkaline phosphatase Mammography Ultrasound and/or MRI Biopsy Pathology review
What is a clinical stage?
Determined before surgery (based on PE and imaging)
What is a pathological stage?
Determined after surgey (includes information from surgical exploration/resection)
What is luminal A classification?
HR-positive
HER-2 Negative
What is Luminal B classification?
HR-positive
HER-2 positive
What is the triple negative classification?
ER-negative
HER-2 negative (basal subtype)
What is the HER-2 enriched classification?
HR-negative
HER-2 positive
What are some potentially modifiable risk factors?
Alcohol
Diet
Exercise
What are the prognostic factors for breast cancer?
Stage at presentation Lifestyle Patient characteristics Disease characteristics Biomarkers
What are the types of proliferation rates in breast cancer?
S-Phase fraction
Ki-67
What combination of hormone receptors has the best prognosis?
ER +
PR +
What combination of hormone receptors has the worse prognosis?
ER -
PR -
What biomarker is amplified/overexpressed in 25% of breast cancers?
HER-2 Neu
erB-2
What are the two testing methods under investigation?
Immunochemistry (IHC)
Fluorescence in-situ hybridization (FISH)
What stages do we use OncotypeDX?
Mostly Stage I or II
ER+ invasive breast cancer
ER+
HER-2 -
What types of surgery are available?
Lumpectomy Simple mastectomy Radical mastectomy Modified radical mastectomy Axillary lymph node dissection Sentinel lymph node biopsy Reconstruction surgery
What is a lumpectomy?
Breast conserving
What is a simple mastectomy?
Entire breast/nipple (leaves lymph node and muscle)
What is a radical mastectomy?
Removal of breast, lymph nodes, pectoralis muscles
What is a modifiedradical mastectomy?
Removal of entire breast w/some axillary lymph nodes