Reproductive risk factor associations with lobular and ductal carcinoma in the Carolina Breast Cancer Study.
Lindsay A WilliamsHazel B NicholsKatherine A HoadleyChiu Kit TseJoseph GeradtsMary Elizabeth BellCharles M PerouMichael I LoveAndrew F OlshanMelissa A TroesterPublished in: Cancer causes & control : CCC (2017)
Lobular tumors were associated with older age at first birth, increased lactation duration, and current oral contraceptive use. Etiologic heterogeneity by histology persisted after restricting to Luminal A subtype, suggesting both tumor histology and intrinsic subtype play integral parts in breast cancer risk.