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British Journal of Radiology (1986) 59, 237-239
© 1986 British Institute of Radiology
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The British Journal of Radiology, Vol 59, Issue 699 237-239, Copyright © 1986 by British Institute of Radiology

ARTICLES

The mammographic breast pattern and oral contraception

SJ Leinster and GH Whitehouse

The relationship of oral contraceptive usage to breast parenchymal patterns has been studied in 5319 self-selected women presenting to a breast screening unit. Among premenopausal women, 46.1% had taken an oral contraceptive ("the pill") in the past, and 9.5% were still taking the pill. These patients showed a decreased incidence of P2 patterns and an increased incidence of N1 patterns. Of the post-menopausal women, 14.7% had been on the pill. Similar differences of incidence of parenchymal patterns are noted in these women. The significance of these changes is unclear.




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