Bottom Line: Risk for aging-related diseases such as heart disease and diabetes was significantly higher among thyroid cancer survivors in Utah than it was among age-matched, cancer-free individuals, with those diagnosed before age 40 having the highest risk for some of the diseases.
Journal in Which the Study was Published: Cancer Epidemiology, Biomarkers & Prevention, a journal of the American Association for Cancer Research.
Author: Mia Hashibe, PhD, associate professor in the Department of Family and Preventive Medicine at the University of Utah, Salt Lake City, and a Huntsman Cancer Institute (HCI) investigator.
Background: Hashibe explained that cancer survivors are living longer today than ever before, and they need to be aware of long-term disease risks. Thyroid cancer survivors are a group we are particularly concerned about for long-term health issues, since thyroid cancer is often diagnosed at an earlier age than other cancers, and the five-year survival rate is very high, at 98 percent, she added.
How the Study Was Conducted and Results: Hashibe and colleagues analyzed electronic medical records, statewide health care data, voter registration records, residential histories, family history records, and birth and death certificates obtained from the Utah Population Database, a research resource managed by the HCI, which contains an extensive collection of family histories linked to medical and demographic records. They identified 3,706 people who had been diagnosed with thyroid cancer between 1997 and 2012, 37 percent of whom were less than age 40 at diagnosis. For each of the thyroid cancer survivors, the researchers extracted data for up to five cancer-free individuals matched to the survivor by birth year, sex, and birth state.
The investigators looked at risk for 39 aging-related diseases. Overall, thyroid cancer survivors had significantly increased risk for many of these diseases. For example, all thyroid cancer survivors had significantly increased risk for hypertension and diabetes at all time points after diagnosis compared with age-matched, cancer-free individuals. For most of the other diseases, risk was increased at some time after diagnosis for either the group diagnosed at a young age or an older age.
For many diseases, including diabetes, cardiomyopathy, osteoporosis, and nutritional deficiencies, the increase in risk was higher for those diagnosed with thyroid cancer before age 40 than for those diagnosed at older ages. For example, survivors diagnosed before age 40 had an almost eightfold increased risk of osteoporosis one to five years after diagnosis compared with age-matched, cancer-free individuals, while survivors diagnosed at older ages had a twofold increase in risk of osteoporosis compared with age-matched, cancer-free individuals.
Author Comment: “We found that thyroid cancer survivors are at increased risk of many aging-related diseases, including diabetes, heart disease, and osteoporosis,” said Hashibe. “Some of the risks appeared to be higher for those diagnosed at a young age–less than 40–than for those diagnosed at older ages, and the more aggressive treatment often given to younger patients may contribute to this.”
“I hope that this study will increase awareness of the long-term health issues experienced by thyroid cancer survivors so that they and their health care providers are proactive about having regular follow-ups and discussions about adopting a healthier lifestyle,” she continued.
Limitations: This is a retrospective, observational study. One of the limitations of the study is that detailed information on treatment was limited, making it hard to determine the effects of specific treatments on risk.
To interview Mia Hashibe, contact Julia Gunther at [email protected] or 215-446-6896.
Funding & Disclosures: This study was supported by the National Institutes of Health, the National Cancer Institute, the Huntsman Cancer Foundation, the Utah State Department of Health, and the University of Utah. Hashibe declares no conflict.
About the American Association for Cancer Research
Founded in 1907, the American Association for Cancer Research (AACR) is the world’s first and largest professional organization dedicated to advancing cancer research and its mission to prevent and cure cancer. AACR membership includes more than 37,000 laboratory, translational, and clinical researchers; population scientists; other health care professionals; and patient advocates residing in 108 countries. The AACR marshals the full spectrum of expertise of the cancer community to accelerate progress in the prevention, biology, diagnosis, and treatment of cancer by annually convening more than 30 conferences and educational workshops, the largest of which is the AACR Annual Meeting with more than 21,900 attendees. In addition, the AACR publishes eight prestigious, peer-reviewed scientific journals and a magazine for cancer survivors, patients, and their caregivers. The AACR funds meritorious research directly as well as in cooperation with numerous cancer organizations. As the Scientific Partner of Stand Up To Cancer, the AACR provides expert peer review, grants administration, and scientific oversight of team science and individual investigator grants in cancer research that have the potential for near-term patient benefit. The AACR actively communicates with legislators and other policymakers about the value of cancer research and related biomedical science in saving lives from cancer. For more information about the AACR, visit http://www.AACR.org.
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