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Black Women With Fibroids Face Elevated Risk Of Endometrial Cancer, Boston University Study



3/30/2016 6:26:29 AM

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Black Women With Fibroids Face Elevated Risk Of Endometrial Cancer

Black women with a history of uterine fibroids have a 40 percent higher risk of endometrial cancer, according to a study led by Boston University School of Public Health researchers at BU’s Slone Epidemiology Center.

The study, published in the journal Cancer Causes and Control in February 2016, found that the association between a history of uterine leiomyoma, or fibroids, and cancer was strongest for cancer diagnosed within two years of uterine fibroids being found—a finding that the researchers say might be explained by greater surveillance of women with fibroids or misdiagnosis of cancer as uterine leiomyoma. An association also was observed for cancer reported ten or more years after fibroids were detected.

Past studies have found that incidence rates for endometrial cancers have risen across all racial and ethnic groups in the US, with the highest annual increase observed among non-Hispanic black women. Compared with white women, black women have two to three times the incidence of uterine fibroids, an earlier age at first diagnosis, and greater disease severity.

Lead researcher Lauren Wise, professor of epidemiology, and co-authors say that because endometrial bleeding is a symptom of both fibroids and uterine cancer, it is possible that some cancers are initially misdiagnosed as fibroids. That could help explain the study’s finding of a stronger association between fibroids and uterine cancer that is diagnosed at later stages (stage 2 or greater), they write.

The research team says it remains unclear whether there is a causal association between uterine fibroids and the incidence of endometrial cancer. Studies of genetic alterations in uterine fibroids have identified several distinct pathways of tumor development.

Co-authors on the study from BU include Todd Sponholtz, Lynn Rosenberg, and Julie Palmer, all with Slone; Michael LaValley of the biostatistics department; and Wendy Kuohung of BU’s School of Medicine.

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