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Original Article
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Volume 356:1295-1303 March 29, 2007 Number 13
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MRI Evaluation of the Contralateral Breast in Women with Recently Diagnosed Breast Cancer
Constance D. Lehman, M.D., Ph.D., Constantine Gatsonis, Ph.D., Christiane K. Kuhl, M.D., R. Edward Hendrick, Ph.D., Etta D. Pisano, M.D., Lucy Hanna, M.S., Sue Peacock, M.S., Stanley F. Smazal, M.D., Daniel D. Maki, M.D., Thomas B. Julian, M.D., Elizabeth R. DePeri, M.D., David A. Bluemke, M.D., Ph.D., Mitchell D. Schnall, M.D., Ph.D., for the ACRIN Trial 6667 Investigators Group

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 by Smith, R. A.

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ABSTRACT

Background Even after careful clinical and mammographic evaluation, cancer is found in the contralateral breast in up to 10% of women who have received treatment for unilateral breast cancer. We conducted a study to determine whether magnetic resonance imaging (MRI) could improve on clinical breast examination and mammography in detecting contralateral breast cancer soon after the initial diagnosis of unilateral breast cancer.

Methods A total of 969 women with a recent diagnosis of unilateral breast cancer and no abnormalities on mammographic and clinical examination of the contralateral breast underwent breast MRI. The diagnosis of MRI-detected cancer was confirmed by means of biopsy within 12 months after study entry. The absence of breast cancer was determined by means of biopsy, the absence of positive findings on repeat imaging and clinical examination, or both at 1 year of follow-up.

Results MRI detected clinically and mammographically occult breast cancer in the contralateral breast in 30 of 969 women who were enrolled in the study (3.1%). The sensitivity of MRI in the contralateral breast was 91%, and the specificity was 88%. The negative predictive value of MRI was 99%. A biopsy was performed on the basis of a positive MRI finding in 121 of the 969 women (12.5%), 30 of whom had specimens that were positive for cancer (24.8%); 18 of the 30 specimens were positive for invasive cancer. The mean diameter of the invasive tumors detected was 10.9 mm. The additional number of cancers detected was not influenced by breast density, menopausal status, or the histologic features of the primary tumor.

Conclusions MRI can detect cancer in the contralateral breast that is missed by mammography and clinical examination at the time of the initial breast-cancer diagnosis. (ClinicalTrials.gov number, NCT00058058 [ClinicalTrials.gov] .)


Source Information

From the University of Washington Medical Center, Seattle (C.D.L., S.P.); Brown University, Providence, RI (C.G., L.H.); University of Bonn, Bonn, Germany (C.K.K.); Feinberg School of Medicine, Northwestern University, Chicago (R.E.H.); University of North Carolina, Chapel Hill (E.D.P.); Porter Adventist Hospital, Denver (S.F.S.); Scottsdale Medical Imaging, Scottsdale, AZ (D.D.M.); Allegheny General Hospital, Allegheny, PA (T.B.J.); Mayo Clinic, Jacksonville, FL (E.R.D.); Johns Hopkins University School of Medicine, Bethesda, MD (D.A.B.); and University of Pennsylvania Medical School, Philadelphia (M.D.S.).

Address reprint requests to Dr. Lehman at the University of Washington Medical Center, Seattle Cancer Care Alliance, 825 Eastlake Ave., E, Rm. G3-200, P.O. Box 19023, Seattle, WA 98109, or at lehman{at}u.washington.edu.

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