Breast cancer 2 Flashcards
biopsy type for breast mass
core needle biopsy
HER2 scoring system
0 to 1+ = “HER2 negative.”
2+ = “borderline,” requiring FISH
3+ = “HER2 positive.”
Classic features of cancerous breast lesion on exam
Hard + immobile + irregular borders
Skin findings that suggest inflammatory breast cancer
Erythema, thickening, or dimpling of overlying skin
Classic mammography findings of breast cancer
Soft tissue mass or density + grouped micro calcifications
MRI features of breast cancer
Irregular or spiculated mass + heterogeneous internal enhancement + enhancing internal septa
Other malignancies that can occur in the breast outside of breast cancer
(think about other tissue types in the breast)
- breast sarcoma
- paget disease
- phyllodes tumors
- lymphoma
Definition of ER-positivity
IHC for ER and PR in more than 1% of tumor cells
Definition of multifocal and multicentric disease
Multifocal = several areas within a single quadrant (so prob represents disease along an entire duct) Multicentric = multiple areas within different quadrants (so disease prob involves multiple ducts)
notation of clinical stage
cTNM = clinical stage pTNM = pathologic stage ypTNM = final pathologic stage after undergoing NAC
Test characteristics of physical exam for lymph node staging + why
Poor NPV (metastatic lymph nodes are often not palpable and reactive lymph nodes may be mistaken for mets)
- PPV = 61-84%
- NPV = 50-60%
Tamoxifen mechanism
SERM – selective estrogen receptor modulator
- Mixed ER antagonistic and agonistic properties
Palbociclib/ribociclib/abemaciclib mechanism
CDK 4/6 inhibitors
Targeted therapies for metastatic breast cancer?
- CDK 4/6 inhibitors
- PI3K
- mTOR
- EGFR
First line *regimens for HER2-negative, hormone receptor positive Stage IV BC
Endocrine therapy + targeted therapy typically
AI + CDK4/6 inhibitor
OR
Fulvestrant + CDK4/6 inhibitor
OR
Selective ER down-regulator + non-steroidal AI
Lapatinib mechanism
TKI of HER2 and EGFR pathways
Axillary imaging modality
US or MRI
Workup of stage IV disease
- Chest CT/abdomen/pelvis with contrast
- IF CNS symptoms – brain MRI
- IF back pain or cord compression symptoms – spine MRI
ER/PR/HER2 status of metastatic tumor
Definition of visceral crisis in breast cancer
Severe organ dysfunction
Preferred regimen for hormone receptor negative, HER2 positive stage IV
pertuzumab + trastuzumab + taxane
median overall survival of metastatic breast cancer
??
2 major phenotypes in metastatic breast cancer
1) Visceral metastases (aggressive phenotype)
2) Bone metastases (indolent phenotype)
Management of stage IV hormone receptor positive, HER2 negative BC
Initial treatment with endocrine therapy, unless visceral crisis, in which case chemo is used
Tumor markers that can be trended for response assessment in MBC (if elevated)?
CA 15-3
CA 27.29
CEA
What are the standardized criteria for determining response to therapy in solid tumors called?
Response Evaluation Criteria in Solid Tumors (RECIST)
Management of AI-induced arthralgia
Switch to a different AI, if persistent, then start tamoxifen
Receptor status of most BRCA 1 tumors
Triple negative
Receptor status of most BRCA 2 tumors
ER+
who needs genetic testing per NCCN
1) triple negative BC
2) male
3) Younger than age 45
4) over 51 + close relative with breast, ovarian, pancreatic cancer
5) some other indications
Adjuvant for ER+ with negative surgical margins
???
- no indication for tamoxifen (no remaining breast tissue)
Margin size to be considered negative for DCIS
2 mm (optimal surgical margin for DCIS)
Indications for post mastectomy radiation
More than 3 lymph nodes involved OR involved margins
First step following disease progression
ALWAYS BIOPSY (receptor status can change)
TDM drug type
HER2 ADC
Problem with breast MRI
high false positive rate
Surveillance modality
Mammography
Management points for localized breast cancer arising from radiation from previous treatment (Eg hodgkin’s)
- can’t reirradiate
- so have to do mastectomy (lumpectomy requires RT)
Relative contraindications to RT for breast cancer
- SLE
- scleroderma and other - connective tissue disease
negative margins broadly speaking with lumpectomy or mastectomy
*Unlike DCIS, you don’t need 2 mm of negative margins
No ink on tumors means
negative margins
Management of HER2+ via IHC
FISH testing (HER2 is intermediate so you need confirmatory testing)
Management of ER/PR positive BC after mastectomy in old patient who values quality of life + intermediate oncotype
Anastrozole, no chemo (noninferior in trials to chemo in terms of disease free survival and OS at 9 years)
When oncotype 21 is used
ER/PR positive AND node negative
Indications for RT in breast cancer
>5cm T4 disease Inflammatory breast cancer nodal involvement positive margins after mastectomy
Breast cancer management in pregnant woman
- Radiation is contraindicated
- Can give chemo during second trimester
- Can’t give tamoxifen
To know about workup in pregnant women
Blue dye is contraindicated during SLNB
ER/PR positive management in men after mastectomy
Tamoxifen (you can’t given an AI because it won’t inhibit testicular production)
Most common phenotype
ER+ (70-80% of breast cancer)
What is the goal of neoadjuvant systemic therapy?
Treat occult micrometastatic disease + surgical minimization
Why is neoadjuvant chemo important?
Surgical minimization (50% of people with node positive disease will be converted to node negative, therefore won’t need axillary dissection)
Why is neoadjuvant endocrine therapy not standard?
Can reduce tumor size, but pCR is rare so it’s not standard
Management of triple negative residual disease
chemo escalation (add capecitabine)
Therapy with more activity for ER+, HER2- negative
- Endocrine therapy has a greater impact than chemo
Neoadjuvant chemo for ER+, HER2-?
Less commonly used since pCR is rare (hence little surgical benefit)
What are the prognostic genomic assays available?
- oncotype
- mammaprint
- prosigna
What is the point of oncotype?
- ER+ derives more benefit from endocrine therapy. Oncotype predicts recurrence + response to chemo, so it is used to determine patients that will benefit and those who derive minimal benefit from chemo and for whom toxicity outweighs benefit
Supportive care for hair loss
- cold caps or scalp cooling device (highly effective in 50-60% of women)
Definition of hormone receptor positive
ER or PR greater than 1% on IHC
Management of vaginal dryness from AI’s
topical moisturizers/lubricants
Main reason for discontinuation of AI’s
MSK symptoms
Phenotype in which late relapse is more commonly seen?
ER+, seldomly seen in ER-
When to extend adjuvant endocrine therapy after 5 years?
- Stage 3 and many Stage 2
- Stage 1 on an individual basis and considering secondary prevention
- patient has tolerated treatment
How long do you extend endocrine therapy?
Typically not longer than 10 years total
How long is trastuzumab given?
1 year (duration given in trial)
Adjuvant treatment of hormone receptor positive breast cancer
- Leuprolide + aromatase inhibitor (exemestane) (ovarian suppression + an aromatase inhibitor has been shown to have a survival benefit over ovarian suppression alone)
When is breast cancer screening recommended after chest wall radiation?
25 or 8 years after completion of radiation therapy, whichever is last
*correct answer
*MRI before 30, only start mammograms at age 30