General Flashcards
Goal of screening mammos
detect pre-clinical breast cancer in ASYMPTOMATIC women
How many cancers are detected by screeners?
2-8 per 1000 screened
Recall rate for screeners?
4-7%
Current ACS guidelines for screening?
annual screening for women > 40yo, OR 10 years younger than a first degree relative with breast cancer
For adequacy the posterior nipple line has to be within what distance of each other on CC and MLO?
1 cm
nipple is required to be in profile on how many views?
at least one view
Pathway of IDC progression
Normal —> FEA -> ADH -> DCIS -> IDC
what percentage of FEA will be upstaged to IDC/DCIS?
14%
What percentage of ADH will be upstaged to IDC/DCIS?
18%
Two most important risk factors for breast cancer?
female sex and advancing age
If DCIS is untreated, what % will progress to IDC?
30-50% in 10 yrs
Earliest and only mammographic manifestion of breast cancer
calcs
MRI findings of DCIS
Clumped NME
focal spot for mammo
0.1 - 0.3 mm
What is important about air gaps in mammography
No grid is needed due to air gap. Air gap reduces scatter.
The pectoralis muscle should extend to at least within ________ cm of the posterior nipple line
1 cm
Using ACR accrediation criteria for clinical image evaluation, what is recommended for visualization of the pectoralis muscle on mammorgraphy?
extends to the level of the posterior nipple line
