Breast cancer Flashcards
Why has there been a increasing incidence in breast cancer?
- Changes in reproductive patterns
- Increased detection of early stages
- Increased mammography screening
- Decline in mortality
Where do researchers believe cancer starts?
junction of the duct and lobule
What are the risk factors for breast cancer?
- Gender - breast cells exposed to estrogen/progesterone
- Age - ⅛ <45, ⅔ > 55
- Genetics - BRCA1 and 2 abnormalities (5-10% hereditary)
- Race - Incidence, White > Black; Morbidity, black > white
- Overweight
- PMH - pregnancy, birth control, HRT, Breast feeding
- Alcohol use - 2-5 drinks per da = 1.5x risk
- Menstrual hx - early onset/ late meno
- Exercise hx - strenuous >4 hr/wk = reduced risk
- Family hx - 1st degree relative = 2x risk
- breast conditions - dense tissue
A test to measure the amount of estrogen and progesterone (hormones) receptors in cancer tissue. If there are more estrogen and progesterone receptors than normal, the cancer is called estrogen and/or progesterone receptor positive. This type of breast cancer may grow more quickly. The test results show whether treatment to block estrogen and progesterone may stop the cancer from growing.
Estrogen and progesterone receptor test
A laboratory test to measure how many HER2/neu genes there are and how much HER2/neu protein is made in a sample of tissue. If there are more HER2/neu genes or higher levels of HER2/neu protein than normal, the cancer is called HER2/neu positive. This type of breast cancer may grow more quickly and is more likely to spread to other parts of the body. The cancer may be treated with drugs that target the HER2/neu protein, such as trastuzumab and pertuzumab.
Human epidermal growth factor type 2 receptor (HER2/ neu) test
What are the different description of breast cancer?
- Hormone receptor positive (estrogen and/or progesterone receptor positive)
- hormone receptor negative (estrogen and/or progesterone receptor negative)
- HER2/neu positive
- HER2/neu negative
- Triple negative (estrogen receptor, progesterone receptor, and HER2/neu negative)
How is breast cancer diagnosed?
- History
- Physical Exam
- Mammogram +/- US
- Needle Biopsy for histological confirmation
What are the types of biopsies?
- Fine Needle aspiration cytology
- Core or Trucut biopsy
- Surgical Biopsy
- Sentinel lymph node - injection of radioactive fluid by tumor to examine lymph nodes surrouding – the dye will go to the lymph node to check it out
What are the types of precancerous/ non invasive breast cancer?
- Ductal Carcinoma in-situ (DCIS)
2. Lobular carcinoma in-situ (LCIS)
What are the types of invasive breast cancer?
- Invasive ductal carcinoma (IDC)
2. Invasive lobular carcinoma (ILC)
What are the different qualifications for staging cancers according to tumor, nodes and mets?
Tumor: T1 < 2cm T2 2-5cm T3 > 5cm T4 skin
Nodes: N0 none N1 mobile N2 fixed N3 clavicular, chest, arm edema
Mets:
M0 none
M1 distant
How do you stage cancer I-IV?
Stage I = T1N0M0 Stage II = T2N0M0, T1-2N1M0 Stage III-A = T3N0-N2M0 Stage III-B = T3N0-N1-3M0, T4N1-3M0 Stage IV = T1-4N1-3M1
5 year survival rate - 0 100% I 100% II 86% III 57% IV 20%
What are surgical treatments for breast cancer?
- Prophylactic
- Mastectomy - Radical masectomy (removal of lymph nodes, pec minor, pec major, breast); Modified Radical Mastectomy (lymph nodes, breast, pec m lining); Sentinel node biopsy
- Breast Conservation and Irradiation - Lumpectomy with axillary dissection; Radiation necessary; Same cure rate as mastectomy; Sentinel node biopsy
When is breast conservation not appropriate?
- Multiple areas of cancer
- Previous radiation to breast
- Large tumor
- Small breast
- Patient’s preference for mastectomy
What are potential problems with sx intervention?
- Scar tissue, cording
- Decreased ROM/strength
- Scapular dysfunction
- Pain
- Surgical resection alone fails to cure 70% of cancers due to regional and distal metastases