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June 19, 2013

Incidence Rate of Breast Cancer in Young Women

Author Affiliations

Letters Section Editor: Jody W. Zylke, MD, Senior Editor.

Author Affiliations: Brigham and Women's Hospital, Boston, Massachusetts (Dr Cramer; dcramer@partners.org); and Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania (Dr Finn).

JAMA. 2013;309(23):2433. doi:10.1001/jama.2013.6450

To the Editor: Dr Johnson and colleagues1 concluded that there has been a significant increase in the incidence of ER+ breast cancer with distant involvement for women aged 25 to 39 years between 1976 and 2009 and urged further study of potential causes. An increase in childhood and adolescent non-Hodgkin lymphoma (NHL) began around the same time and was recognized in the late 1990s, with similar questions raised about causes.2