Summary
Tissue from contralateral breast was taken from 505 patients with invasive breast cancer. Every 5th patient had simultaneous carcinom in the opposite breast, 7.7% (39/505) had invasive cancer, and 13.1% (66/505) had carcinoma in situ.
Invasive cancers in the opposite breast were diagnosed at an earlier stage as compared with the neoplasm of the primary breast. However, 26% of the patients already had positive axillary nodes. The following risk indicators of the bilateral disease were found: age at time of diagnosis, histologic type of tumours, familial breast cancer, suspicious mammography, P2/DY-breast parenchymal pattern (Wolfe) and multicentric cancer of primary breast. Our findings support the proposal to consider bilaterality of breast cancer as a sign of systemic disease of the breasts, involving the ductal and lobular system within eight quadrants of a paired organ (Ober).
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Dedicated to Prof. Dr. K. G. Ober on his 70th birthday. His personal support and professional acumen has made this investigation possible
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Tulusan, A.H., Ronay, G., Egger, H. et al. A contribution to the natural history of breast cancer. Arch. Gynecol. 237, 85–91 (1985). https://doi.org/10.1007/BF02199712
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DOI: https://doi.org/10.1007/BF02199712