IM Oncology Flashcards
Breast Cancer
Presentation
breast cancer is found in asymptomatic women on screening ammography or by the palpation of a mass by the pt or a physician. when breast cncer presents as a plapable mass, it is hard to the touch. it may also be associated with retraction of the nipple bc ligaments int eh breast will withdraw and pull the nipple inward
Breast Cancer
diagnostic tests
FNA
core needle biopsy
open biopsy
Breast Cancer is usually
painless
Breast Cancer
FNA
usually the best initial biopsy. the false positive rates are less than 2%. however, bc fna is a small sample the disadvantages are a false negative rate of 10%
Breast Cancer
core needle biopsy
this is a larger sample of the breast. it is more deforming, but you can test for estrogen receptors (ER), progesterone, receptors (PR), and HER 2/neu. the difficulties inclued greater deformity with the procedure and the possibilitiy taht the needle will miss the lesion
Breast Cancer
open biopsy
the most accurate diagnostic test, allows for frozen section to be done while the pt is in the operating room followed by immediate resection of cancer followed by sentinel node biopsy
when can you not test for estrogen progestreon or her2/neu
on FNA
mammography
indicated to screen for breast cancer in the general population starting at age 50
why do a mammo on a person with a palpable mass
bc 5-10% of pts have bilateral disease, also to determine if there is multiple or just a single mass.
when is ultrasound the answer with breast lesion
clinically indeterminant mass lesions, it tells cysts versus solid lesions
if it is painful
if it varies in size with menstruation
when is PET scan the answer with breast lesion
to determine the content of abnormal lymph nodes that are not easily accessible to biopsy, cancer increases uptake on PET scan
like an abnormal hilar lymph node
how do you tell the content of an abnormal inaccessible lesion without biopsy
PET scan
When is BRCA testing the answer to breast lesion
BRCA is definitely associated with an increased risk of breast cancer, particularly within families
BRCA is associated with ovarian cancer and pancreatic cancer
what do you do if pt is BRCA positive
BRCA has not yet been shown to add mortality benefit to usual management. however, some pts opt for bilateral mastectomy
When is sentinel lymph node biopsy the answer to breast lesion
Sentinel node biopsy is done routinely in all pts at the time of lumpectomy or mastectomy
a negative sentinel lymph node eliminates the need for axillary lymph node dissection
When are estrogen and progesterone receptors tested in breast lesion
estrogen recptor and prgesterone rectpro testing is routine for all pts
hormone manipulation therapy is done if either test is positive
step 2 will not test on
who should get brca
Breast Cancer treatment
surgery
lumpectomy with radiation is equal in efficacy to modified radical mastecomty but much less deforming. the addition of radiation to lumpetomy is not a small issue. radiation at the site of the cancer is indispensible in preventing recurrences at the breast. lumpectomy is contraindicated if the cancer is multifocal or radiation is contraindicated
radical mastectomy is
always the wrong answer
Breast Cancer treatment
hormonal manipulation
all ER or Pr positive pts should receive tamoxifen, faloxifen, or one of the aromatase inhibitors (anastrazole, letrozole, exemestane). aromatase inhibitors seem to have a slight superiority in efficacy. if both are among the answer choices,
aromatase inihibitors are the answer to
the most likely to benefit the pt question
aromatase inhibitors are generally for
postmenopausal women
tamoxifen is better in
premenopausal women
tamoxifen ae
endometrial cancer and clots (it is a selective ER modifier)
Aromatase inhibitors ae
osteoporosis
Aromatase inhibitors moa
inhibit estrogen effect everywhere, even the good effects like on bone density
Trastuzumab
all breat cancers should be tested for Her 2/neu. this is an abnormal estrogen receptor
those who are positive should receive anti-Her 2/neu antibodies (trastuzumab)
decreases the risk of recurrent disease and increase survival
adjuvant chemotherapy in breast cancer
not prohylactic bc pt already has the disease
it is not treatmen tsinc eth termi implies there are no clearly identified mets
adjuvent meant an additional therapy to clean up presumed microscopic cancer cells too small in amount to be detected
When is adjuvant chemotherapy in breast cancer the answer
lesions are larger than 1 cm
positive axillary lymph nodes are found