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. 2012 Mar 27;14(2):R55.
doi: 10.1186/bcr3156.

Occurrence of breast cancer subtypes in adolescent and young adult women

Theresa H M Keegan  1 , Mindy C DeRouen, David J Press, Allison W Kurian, Christina A Clarke
Affiliations

Occurrence of breast cancer subtypes in adolescent and young adult women

Theresa H M Keegan et al. Breast Cancer Res. .

Abstract

Introduction: Breast cancers are increasingly recognized as heterogeneous based on expression of receptors for estrogen (ER), progesterone (PR), and human epidermal growth factor receptor 2 (HER2). Triple-negative tumors (ER-/PR-/HER2-) have been reported to be more common among younger women, but occurrence of the spectrum of breast cancer subtypes in adolescent and young adult (AYA) women aged between 15 and 39 years is otherwise poorly understood.

Methods: Data regarding all 5,605 AYA breast cancers diagnosed in California during the period 2005 to 2009, including ER and PR status (referred to jointly as hormone receptor (HR) status) and HER2 status, was obtained from the population-based California Cancer Registry. Incidence rates were calculated by subtype (triple-negative; HR+/HER2-; HR+/HER2+; HR-/HER2+), and logistic regression was used to evaluate differences in subtype characteristics by age group.

Results: AYAs had higher proportions of HR+/HER2+, triple-negative and HR-/HER2+ breast cancer subtypes and higher proportions of patients of non-White race/ethnicity than did older women. AYAs also were more likely to be diagnosed with stage III/IV disease and high-grade tumors than were older women. Rates of HR+/HER2- and triple-negative subtypes in AYAs varied substantially by race/ethnicity.

Conclusions: The distribution of breast cancer subtypes among AYAs varies from that observed in older women, and varies further by race/ethnicity. Observed subtype distributions may explain the poorer breast cancer survival previously observed among AYAs.

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Figures

Figure 1
Figure 1
Age-specific incidence rates of breast cancer by subtypes among California women aged 15 to 39 years, 2005-2009. Hormone receptor (HR)-positive and human epidermal growth factor receptor 2 (HER2)-negative (diamond), HR+/HER2+ (square), HR-/HER2+ (triangle), and triple-negative (X).
Figure 2
Figure 2
Proportion of breast cancer subtypes among California women by age group, 2005-2009. Hormone receptor (HR)-positive and human epidermal growth factor receptor 2 (HER2) negative (blue), HR+/HER2+ (red), HR-/HER2+ (green), and triple-negative (purple).
See this image and copyright information in PMC

Comment in

References

    1. Bleyer A, Barr R, Hayes-Lattin B, Thomas D, Ellis C, Anderson B. The distinctive biology of cancer in adolescents and young adults. Nat Rev Cancer. 2008;8:288–298. doi: 10.1038/nrc2349. - DOI - PubMed
    1. Gabriel CA, Domchek SM. Breast cancer in young women. Breast Cancer Res. 2010;12:212. doi: 10.1186/bcr2647. - DOI - PMC - PubMed
    1. Gnerlich JL, Deshpande AD, Jeffe DB, Sweet A, White N, Margenthaler JA. Elevated breast cancer mortality in women younger than age 40 years compared with older women is attributed to poorer survival in early-stage disease. J Am Coll Surg. 2009;208:341–347. doi: 10.1016/j.jamcollsurg.2008.12.001. - DOI - PMC - PubMed
    1. Kurian A, Fish K, Shema S, Clarke C. Lifetime risks of specific breast cancer subtypes among women in four racial/ethnic groups. Breast Cancer Res. 2010;12:R99. doi: 10.1186/bcr2780. - DOI - PMC - PubMed
    1. Schmidt C. Lack of progress in teen and young adult cancers concerns researchers, prompts study. J Natl Cancer Inst. 2006;98:1760–1763. doi: 10.1093/jnci/djj517. - DOI - PubMed

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