The Variation of Breast Parenchymal Patterns with Age

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Abstract
The Wolfe classification of mammographic parenchymal patterns was applied to 9036 women attending a Breast Cancer Screening Unit. Overall, 2/3 fell into high risk categories (P2 [extensive ductal prominence] and DY [dense stromal pattern]). The incidence of DY decreases with age; the low risk categories (N1 and P1) increase with age. P2 remains constant over most of the age range. The implications of these findings are discussed and comparison is made with other series.