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Practice

Breast screening with magnetic resonance imaging

Anabel Scaranelo
CMAJ November 06, 2012 184 (16) E877; DOI: https://doi.org/10.1503/cmaj.110008
Anabel Scaranelo
From the Medical Imaging Department, Princess Margaret Hospital, and the Marvelle Koffler Breast Centre, Mount Sinai Hospital, Toronto, Ont.
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  • For correspondence: scaranelo@uhn.ca
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See also practice article by Warner and colleagues at www.cmaj.ca/lookup/doi/10.1503/cmaj.120392

Breast screening with magnetic resonance imaging (MRI) is supplementary to mammography

The availability of MRI as a supplementary examination to mammography offers a clear clinical benefit to some women at high risk for breast cancer.1–5 In a meta-analysis of 11 studies, MRI had a significantly higher sensitivity than mammography when used in dense breasts.1 However, MRI is not meant to replace mammography. Some cancers, such as ductal carcinoma in situ, may be detected by mammography but not by MRI.2

The best time for MRI is during the second week of the menstrual cycle

Because normal breast tissue may interfere with accurately interpreting the MRI study, the timing of imaging during the menstrual cycle is important.4

Breast screening with MRI should be offered to patients at high risk

Several guidelines2–5 recommend annual supplemental screening with MRI for women who are at high risk for breast cancer (lifetime risk 20%–25% or more). This includes women who carry mutations of the BRCA genes, their first-degree untested relatives, and women who received radiation to the chest between the ages of 10 and 30 years (e.g., treatment for Hodgkin lymphoma). Expert consensus does not currently support supplemental MRI screening for women with a lifetime risk of breast cancer that is less than 15%. There is considerable uncertainty over the use of MRI screening for women with intermediate risk (15%–20%), including those with dense breasts or a previous diagnosis of atypia (e.g., lobular carcinoma in situ, atypical lobular hyperplasia, atypical ductal hyperplasia) on breast biopsy.2,3

Tools are available to determine who is at high risk

Prediction models are constantly evolving. Although all have limitations, a particularly comprehensive tool to assess lifetime risk has been developed by the International Breast Cancer Intervention Study (available at www.ems-trials.org/riskevaluator/). No model currently includes breast density on mammography as a covariate. Referral to a genetics or breast cancer clinic is useful in clarifying risk.

A single screening MRI may be considered for women with newly diagnosed breast cancer

Guidelines recommend that women with newly diagnosed breast cancer (particularly lobular-type breast cancer) and a normal examination of the contralateral breast by conventional imaging (mammography or ultrasound) and clinical palpation should receive a single screening MRI of the contralateral breast at the time of diagnosis.2

Footnotes

  • Competing interests: None declared.

  • This article has been peer reviewed.

References

  1. ↵
    1. Warner E,
    2. Messersmith H,
    3. Causer P,
    4. et al
    . Systematic review: using magnetic resonance imaging to screen women at high risk for breast cancer. Ann Intern Med 2008;148:671–9.
    OpenUrlCrossRefPubMed
  2. ↵
    1. Lee CH,
    2. Dershaw DD,
    3. Kopans D,
    4. et al
    . Breast cancer screening with imaging: recommendations from the Society of Breast Imaging and the ACR on the use of mammography, breast MRI, breast ultrasound, and other technologies for the detection of clinically occult breast cancer. J Am Coll Radiol 2010;7:18–27.
    OpenUrlCrossRefPubMed
  3. ↵
    1. Saslow D,
    2. Boetes C,
    3. Burke W,
    4. et al.
    American Cancer Society Breast Cancer Advisory Group. American Cancer Society guidelines for breast screening with MRI as an adjunct to mammography. CA Cancer J Clin 2007;57:75–89.
    OpenUrlCrossRefPubMed
  4. ↵
    1. Mann RM,
    2. Kuhl CK,
    3. Kinkel K,
    4. et al
    . Breast MRI: guidelines from the European Society of Breast Imaging. Eur Radiol 2008;18:1307–18.
    OpenUrlCrossRefPubMed
  5. ↵
    1. Sardanelli F,
    2. Boetes C,
    3. Borisch B,
    4. et al
    . Magnetic resonance imaging of the breast: recommendations from the EUSOMA working group. Eur J Cancer 2010;46:1296–316.
    OpenUrlCrossRefPubMed
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Canadian Medical Association Journal: 184 (16)
CMAJ
Vol. 184, Issue 16
6 Nov 2012
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Breast screening with magnetic resonance imaging
Anabel Scaranelo
CMAJ Nov 2012, 184 (16) E877; DOI: 10.1503/cmaj.110008

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Anabel Scaranelo
CMAJ Nov 2012, 184 (16) E877; DOI: 10.1503/cmaj.110008
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    • Breast screening with magnetic resonance imaging (MRI) is supplementary to mammography
    • The best time for MRI is during the second week of the menstrual cycle
    • Breast screening with MRI should be offered to patients at high risk
    • Tools are available to determine who is at high risk
    • A single screening MRI may be considered for women with newly diagnosed breast cancer
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