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JAMA. 1982 Jan 8;247(2):185-9.

Mammographic parenchymal patterns. Risk indicator for breast cancer?


Mammographic parenchymal patterns, originally presented as a new risk factor for breast cancer, have been prospectively studied in a large (27,157 examinations) consecutive screening population. Although there is a significantly higher risk of breast cancer in the so-called dysplastic breasts (P2 and DY pattern groups), the classification is of little practical value, as more than 72% of the cancers in the prevalent population were found in the so-called low-risk breasts (N1 and P1 pattern groups). A similar trend occurred at repeated screening of younger women, in which most of the "incident" cancers were found in the "low-risk" breasts. These patterns should not be used to influence patient management or screening programs.

[Indexed for MEDLINE]

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