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Original Article
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Volume 340:430-436 February 11, 1999 Number 6
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Radial Scars in Benign Breast-Biopsy Specimens and the Risk of Breast Cancer
Timothy W. Jacobs, M.D., Celia Byrne, Ph.D., Graham Colditz, M.D., James L. Connolly, M.D., and Stuart J. Schnitt, M.D.

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ABSTRACT

Background Radial scars are benign breast lesions of uncertain clinical significance. In particular, it is not known whether these lesions alter the risk of breast cancer in women with benign breast disease. We conducted a case–control study of women who had benign breast lesions with or without radial scars.

Methods We reviewed benign breast-biopsy specimens from 1396 women enrolled in the Nurses' Health Study, including 255 women in whom breast cancer subsequently developed and 1141 women without subsequent breast cancer (controls). The controls were matched to the women with subsequent breast cancer according to age and the year when the benign lesion was identified. The median follow-up after biopsy of the benign lesions was 12 years.

Results Radial scars were identified in biopsy specimens from 99 women (7.1 percent). Most biopsy specimens with radial scars had only one radial scar (60.6 percent), and they tended to be incidental microscopical findings (median size, 4.0 mm). The women with radial scars had a risk of breast cancer that was almost twice the risk of the women without scars, regardless of the histologic type of benign breast disease (relative risk, 1.8; 95 percent confidence interval, 1.1 to 2.9). Among women who had proliferative disease without atypia as compared with women who had nonproliferative disease, the relative risk of breast cancer was 3.0 (95 percent confidence interval, 1.7 to 5.5) for those with radial scars and 1.5 (95 percent confidence interval, 1.1 to 2.1) for those without radial scars. Among women with atypical hyperplasia as compared with women with nonproliferative disease, the relative risk of breast cancer was 5.8 (95 percent confidence interval, 2.7 to 12.7) for those with radial scars and 3.8 (95 percent confidence interval, 2.4 to 5.9) for those without radial scars.

Conclusions Radial scars are an independent histologic risk factor for breast cancer.


Source Information

From the Department of Pathology, Beth Israel Deaconess Medical Center (T.W.J., J.L.C., S.J.S.); Harvard Medical School (T.W.J., C.B., G.C., J.L.C., S.J.S.); and Channing Laboratory, Department of Medicine, Brigham and Women's Hospital (C.B., G.C.) — all in Boston.

Address reprint requests to Dr. Schnitt at the Department of Pathology, Beth Israel Deaconess Medical Center, East Campus, 330 Brookline Ave., Boston, MA 02215.

Full Text of this Article


Related Letters:

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