BI-RADS Flashcards
Can BI-RADS 6 be used for a pt with treated cancer?
NO!! BI-RADS 6 can only be used for pt with known biopsy proven cancer that has not been treated yet
The term “circumscribed” is BEST defined by ?
At least 75% of the margin is well defined
multiple bilateral circumscribed masses on screening mammograph
BI-RADS 2
Descriptions for mass shape:
only 3: - oval - round - irregular
Descriptors for echogenicity:
- anechoic - hypoechoic - isoechoic - hyperechoic - complex
BI-RADS category with 2-95% probabililty of malignancy
BI-RADS 4; suspicious abnormality
BI-RADS 4 probability of malignancy
2-95%
BI-RADS ultrasound lexicon for mass margin
-circumscribed - indistinct - angular - microlobulated - spiculated
BI-RADS definition of a mass:
“a 3D structure demonstrating convex outward borders, usually evident on 2 orthogonal views.” No size definition for mass
Baseline screening mammogram in a 43-year-old woman showed a solitary mass. Ultrasound image from the diagnostic imaging is provided. What is the most appropriate BI-RADS assessment?
Ultrasound shows a circumscribed, oval, isoechoic mass . This would normally be considered probably benign (BI-RADS 3), with recommendation for surveillance at 6, 12, and 24 months if stable at each examination.
Which organization created and maintains the BI-RADS lexicon?
ACR
BI-RADS is an acronym for Breast Imaging-Reporting and Data System, a quality assurance tool originally designed for use with mammography. The system is a collaborative effort of many health groups but is published and trademarked by the American College of Radiology (ACR).
A finding lacking convex borders is only seen on 1 view. This would be BEST characterized by:
Asymmetry
Breast density is assessed with the following categories according to the fifth edition BI-RADS atlas published in 2014:
(a) “The breasts are almost entirely fatty”; (b) “There are scattered areas of fibroglandular densitiy”; (c) “The breasts are heterogeneously dense, which may obscure small masses”; and (d) “The breasts are extremely dense, which lowers the sensitivity of mammography”
How many follow-up visits are suggested for a BI-RADS 3 (probably benign) lesion if stable at each follow-up?
Surveillance is usually performed at 6 months, 12 months, and 24 months, with the option to extend the surveillance period to 36 months if stable at each follow-up (total of 3-4 visits)
BI-RADS category denoting <2% chance of malignancy
BI-RADS 3
A BI-RADS 3 finding should have less than a 2% risk of malignancy and is not expected to change over the follow-up interval. For example, a nonpalpable, circumscribed mass on a baseline mammogram is considered BI-RADS 3, unless it can be shown to be a cyst. Other examples of BI-RADS 3 include a focal asymmetry which becomes less dense on spot compression views, or a cluster of punctuate calcifications.
BI-RADS assessment category 2 indicates:
BI-RADS 2 is used when the radiologist chooses to describe a characteristically benign finding. Examples of possible BI-RADS 2 findings include calcified involuting fibroadenoma, secretory calcifications, fat-containing lesion, simple cyst, intramammary lymph node, or architectural distortion related to known prior surgery.
> 95% likelihood of malignancy
BI-RADS 5
What does the term BI-RADS stand for?
Breast Imaging Reporting and Data System (BI-RADS) is a lexicon of terminology developed through the American College of Radiology to standardize terms to describe breast density, mammographic findings, and assessment and management recommendations. There are modality-specific terminologies for each of the principle diagnostic modalities including mammography, ultrasound, and MRI. These lexicons are updated periodically as knowledge increases.
A 40-year-old woman has a smooth, oval, nonpalpable mass measuring 8 mm on her baseline mammogram. What is the likelihood of malignancy?
<2%
These features suggest a “probably benign” (BI-RADS 3) mass. The < 2% likelihood of malignancy is based on retrospective studies of masses with these features (i.e., not growing, not palpable, no irregular features).
