This case series describes four women who developed breast cancer after carrying their phone against their breast up to 10 hours a day, for several years. All tumors developed underneath the position of the phone and had uncanny similarities.

PMID: 

Case Rep Med. 2013 ;2013:354682. Epub 2013 Sep 18. PMID: 24151509

Abstract Title: 

Multifocal Breast Cancer in Young Women with Prolonged Contact between Their Breasts and Their Cellular Phones.

Abstract: 

Breast cancer occurring in women under the age of 40 is uncommon in the absence of family history or genetic predisposition, and prompts the exploration of other possible exposures or environmental risks. We report a case series of four young women-ages from 21 to 39-with multifocal invasive breast cancer that raises the concern of a possible association with nonionizing radiation of electromagnetic field exposures from cellular phones. All patients regularly carried their smartphones directly against their breasts in their brassieres for up to 10 hours a day, for several years, and developed tumors in areas of their breasts immediately underlying the phones. All patients had no family history of breast cancer, tested negative for BRCA1 and BRCA2, and had no other known breast cancer risks. Their breast imaging is reviewed, showing clustering of multiple tumor foci in the breast directly under the area of phone contact. Pathology of all four cases shows striking similarity; all tumors are hormone-positive, low-intermediate grade, having an extensive intraductal component, and all tumors have near identical morphology. These cases raise awareness to the lack of safety data of prolonged direct contact with cellular phones.

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