ACR Appropriateness Criteria®
Clinical Condition: Breast Microcalcifications - Initial Diagnostic Workup
Variant 1: Pleomorphic, fine, linear, branching in any distribution.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution, and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
1 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 2: Documentation of skin calcification.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
Mammography short interval follow-up
|
2 |
|
|
US breast |
1 |
|
O
|
MRI breast without and with contrast |
1 |
|
O
|
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 3: Milk of calcium, any distribution.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
Mammography short interval follow-up
|
2 |
|
|
US breast |
1 |
|
O
|
MRI breast without and with contrast |
1 |
|
O
|
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 4: Amorphous, single cluster.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass or focal asymmetry. |
O |
Mammography short interval follow-up |
1 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 5: Amorphous, multiple clusters, one breast.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
Mammography short interval follow-up |
2 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 6: Amorphous, multiple bilateral clusters.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
5 |
If further evaluation is needed to better characterize the calcification. |
|
Mammography short interval follow-up |
2 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 7: Amorphous in a regional distribution.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
Mammography short interval follow-up |
2 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 8: Amorphous in a linear or segmental distribution.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
2 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 9: Course (popcorn), large rod-like, dystrophic, suture, lucent-centered, egg shell rim.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
1 |
|
|
Mammography short interval follow-up |
1 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 10: Round or punctate, clustered.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
Mammography short interval follow-up |
2 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 11: Round or punctate, regional.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
4 |
If further evaluation is needed to better characterize the calcification. |
|
Mammography short interval follow-up |
2 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 12: Punctate calcifications in a linear or segmental distribution.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
2 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 13: Punctate and amorphous, diffuse, bilateral.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
3 |
|
|
Mammography short interval follow-up |
2 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 14: Course heterogeneous, single cluster.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
2 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 15: Course heterogeneous, multiple clusters, one breast.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
8 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
2 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 16: Course heterogeneous, multiple bilateral clusters.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
3 |
|
|
Mammography short interval follow-up |
1 |
|
|
US breast |
1 |
|
O |
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 17: Course heterogeneous, in regional distribution.
Radiologic Procedure |
Rating |
Comments |
RRL* |
Mammography diagnostic |
5 |
If further evaluation is needed to better characterize the calcification. |
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
2 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Variant 18: Course heterogeneous, in linear or segmental distribution.
Radiologic Procedure |
Appropriateness Rating |
Comments |
RRL* |
Mammography diagnostic |
9 |
|
|
US breast |
4 |
Only after diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or having an extensive distribution and an underlying invasive component is suspected. |
O |
Mammography short interval follow-up |
1 |
|
|
MRI breast without and with contrast |
1 |
|
O |
PET breast |
1 |
|
|
Tc-99m sestamibi scan breast |
1 |
|
|
Core biopsy breast |
1 |
|
NS |
Fine needle aspiration breast |
1 |
|
NS |
Imaging localization for surgical excision breast |
1 |
|
NS |
Rating Scale: 1,2,3 Usually not appropriate; 4,5,6 May be appropriate; 7,8,9 Usually appropriate |
*Relative Radiation Level |
Note: Abbreviations used in the tables are listed at the end of the "Major Recommendations" field.
Summary of Literature Review
Ductal carcinoma-in-situ (DCIS) represents 25%-30% of all reported breast cancers. Approximately 95% of all DCIS is diagnosed because of mammographically detected microcalcifications. Prior to the widespread use of screening mammography, DCIS, detected as a mass on physical examination, was an uncommon disease representing less than 3% of all breast cancers. Screening mammography is the only reliable tool available for the detection of breast microcalcifications and DCIS.
Breast microcalcifications are detected commonly on screening mammograms. Other initial radiologic procedures for workup of the various types of screening-detected calcifications are described below. Most breast calcifications are benign and can be classified accordingly without any additional work-up. In women with an indeterminate or higher probability of malignancy calcifications on screening studies, microfocus (0.1 mm focal spot) magnification views in orthogonal projections are useful. Interpretation using softcopy readout on 5M cathode ray tube (CRT) or liquid crystal display (LCD) monitors allows evaluation comparable to that of film. Although initial studies suggest that 3M LCD monitors may allow accurate analysis of calcifications, further studies are needed.
On magnification images, additional calcifications may be apparent, the morphology of individual calcifications can be characterized, and the distribution of calcifications can be better determined. For probably benign calcifications, short-interval follow-up with diagnostic mammography may be appropriate. In women with malignant calcifications, magnification images may be helpful in establishing the extent of disease. In cases of extensive malignant calcifications or malignant calcifications with an associated soft-tissue density, ultrasound may be useful in diagnosing an invasive component.
Currently, the role for computer-aided detection (CAD) of calcifications has not yet been determined. However, recent studies indicate that CAD can be clinically useful to avoid false negatives when used properly. CAD applied directly to full-field digital mammography (FFDM) images is comparable to CAD applied to digitized analog mammograms. CAD may improve detection of DCIS; however, due to its variable sensitivity for amorphous calcifications, CAD findings should not be used to avert call-back of suspicious calcifications.
Currently, only lossless compression (3:1 compression ratio or less) of digital mammograms is recommended for storage or transport. Although initial studies suggest compression ratios as high as 15:1 (lossy) may still allow accurate analysis of calcifications, larger studies are needed to evaluate the possible effects of data compression of >3:1 on calcification detection and analysis.
The use of magnetic resonance imaging (MRI), breast-specific gamma imaging (BSGI), positron emission mammography (PEM), and ductal lavage in evaluating clustered microcalcifications has not been established. In general, they should not be used to avoid biopsy of mammographically suspicious calcifications.
Stereotactically guided core biopsy using a variety of devices can sample areas of microcalcifications. Stereotactically guided fine needle aspiration (FNA) of microcalcifications has been shown to be inaccurate. Core biopsy specimen radiographs should be obtained to establish the presence of calcifications in the core, as is done with surgically excised specimens. Use of eleven-gauge vacuum-assisted core devices may improve the probability of obtaining calcifications compared to 14-gauge spring-loaded or 14-gauge vacuum-assisted biopsy devices. For 11-gauge vacuum biopsy, obtaining 12 samples has been shown to be optimal. For subtle residual calcification or calcifications that have been completely removed, a marker clip should be placed. The position of the marker clip in relation to the biopsy site should be documented in the report and on postbiopsy mammograms.
Summary
- Diagnostic mammographic workup (including spot magnifications views in the craniocaudal and 90 ml projections) remains the optimal initial procedure for evaluating screening-detected calcifications that are not typically benign.
- Ultrasound should only be performed if the diagnostic mammographic workup demonstrates suspicious microcalcifications with an associated mass/focal asymmetry or in cases of suspicious calcifications with an extensive distribution. This may be useful in determining the method of biopsy guidance, diagnosing invasive disease, and facilitating a single-step surgery (excision and lymph node dissection).
- Currently, short-term follow-up or biopsy of calcifications directly from screening mammography is not recommended. In addition, the utility of PEM, BSGI, or MRI for the initial evaluation of screening-detected microcalcifications has not been established.
Abbreviations
- MRI, magnetic resonance imaging
- NS, not specified
- PET, positron emission tomography
- Tc, technetium
- US, ultrasound
Relative Radiation Level Designations
Relative Radiation Level* |
Adult Effective Dose Estimate Range |
Pediatric Effective Dose Estimate Range |
O |
0 mSv |
0 mSv |
|
<0.1 mSv |
<0.03 mSv |
|
0.1-1 mSv |
0.03-0.3 mSv |
|
1-10 mSv |
0.3-3 mSv |
|
10-30 mSv |
3-10 mSv |
|
30-100 mSv |
10-30 mSv |
*RRL assignments for some of the examinations cannot be made, because the actual patient doses in these procedures vary as a function of a number of factors (e.g., region of the body exposed to ionizing radiation, the imaging guidance that is used). The RRLs for these examinations are designated as NS (not specified). |