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Home NEWS Science News Health

Greater prevalence of anal cancer precursors for women living with HIV than prior reports

Bioengineer by Bioengineer
July 11, 2019
in Health
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Researchers say new strategies needed for anal cancer prevention in women living with HIV

The prevalence of anal high-grade squamous intraepithelial lesions (HSIL), which precede anal cancer, is much higher in women living with HIV than previously reported, a multi-site, national study involving hundreds of patients has found. Conducted by researchers from the AIDS Malignancy Consortium, a National Cancer Institute-supported clinical trials group, the results call for new strategies to be developed for wider screening of women living with HIV, who have disproportionally higher rates of anal cancer compared to the general population of women. The study appears in Clinical Infectious Diseases.

To determine the true prevalence of anal HSIL in women living with HIV in the United States, the researchers, for the first time, conducted a full anal evaluation including a high resolution anoscopy (an examination of the anus under magnification) with directed biopsy on all 256 female study participants, not just on those who had an abnormal screening test or triage. The prevalence of anal HSIL was 27 percent, substantially higher than previous study estimates, which ranged between four to nine percent.

“We believe most prior studies of anal HSIL prevalence in women living with HIV under-represented the true percentage because only individuals with abnormal anal cytology underwent high resolution anoscopy in past studies, compared to all the participants in this new study,” said Dr. Elizabeth Chiao, the co-author and principal investigator of the study. Dr. Chiao is a professor of medicine in the section of infectious diseases at Baylor College of Medicine and with the Houston VA Center for Innovations in Quality, Effectiveness and Safety.

The study was conducted at 12 academic medical centers across the United States, with the participants recruited between 2014 and 2016. The mean age of participants was 49.4 years, 64 percent were non-Hispanic black, and 67 percent were former or current smokers.

“The high prevalence of anal cancer precursors and invasive anal cancer among women living with HIV calls for greater screening in this population,” said lead author Elizabeth Stier, MD, of Boston Medical Center, who is also an associate professor of obstetrics and gynecology at Boston University School of Medicine. “Because optimal screening strategies are still not yet known, prevention of anal cancer among this population should focus on identifying cost-effective strategies for the detection and management of anal cancer precursors.”

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Screening women living with HIV for anal cancer has been recommended by national organizations, including the American Cancer Society, the Infectious Diseases Society of America, and the American Society of Colon and Rectal Surgeons.

The study was supported by the National Cancer Institute at the National Institutes of Health.

About Boston Medical Center

Boston Medical Center is a private, not-for-profit, 514-bed, academic medical center that is the primary teaching affiliate of Boston University School of Medicine. It is the largest and busiest provider of trauma and emergency services in New England. Boston Medical Center offers specialized care for complex health problems and is a leading research institution, receiving more than $116 million in sponsored research funding in fiscal year 2017. It is the 15th largest recipient of funding in the U.S. from the National Institutes of Health among independent hospitals. In 1997, BMC founded Boston Medical Center Health Plan, Inc., now one of the top ranked Medicaid MCOs in the country, as a non-profit managed care organization. Boston Medical Center and Boston University School of Medicine are partners in the Boston HealthNet – 14 community health centers focused on providing exceptional health care to residents of Boston. For more information, please visit http://www.bmc.org.

Media Contact
David Kibbe
[email protected]
http://dx.doi.org/10.1093/cid/ciz408

Tags: AIDS/HIVcancerGynecologyInfectious/Emerging DiseasesMedicine/HealthMicrobiologyPublic HealthSex-Linked Conditions
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