Adult Cancer Survivors are at Increased Risk for Bone Fractures
A new large study by researchers at the American Cancer Society found that adult cancer survivors, particularly those diagnosed within ﬁve years and/or have a history of chemotherapy, have an increased risk for bone fractures, speciﬁcally pelvic and vertebral fractures, compared to older adults without cancer. The findings, published in the Journal of the American Medical Association (JAMA) Oncology, also reports survivors who were physically active tended to have a lower risk of bone breakage, and survivors who smoked were associated with a higher risk.
“These ﬁndings are important as the number of cancer survivors living in the United States is projected to rise to 26.1 million by 2040. Research like this seeks ways for cancer survivors to have a better quality of life after their diagnosis,” said Dr Erika Rees-Punia, senior principal scientist, behavioral and epidemiology research at the American Cancer Society and lead author of the study. “Fractures of the pelvis and vertebrae are more than just broken bones –they are serious and costly.”
Researchers analyzed data from participants of the Cancer Prevention Study-II Nutrition Cohort linked to Medicare claims from 1997-2017. They investigated the associations between cancer diagnoses, including time since and stage at diagnosis, and risk of pelvic, radial, and vertebral fractures (separately and combined) compared to adults without a history of cancer. Secondarily, they examined differences in the risk of fracture stratiﬁed by modiﬁable behaviors, treatment, and cancer type.
The results showed among the 92,431 participants included in the study, 12,943 experienced a frailty-related bone fracture. Compared to participants without a history of cancer, cancer survivors who were more recently diagnosed within ﬁve years with an advanced stage cancer had the highest risk of fracture. The higher fracture risk in cancer survivors was driven largely by vertebral and pelvic fracture sites. Compared to cancer survivors who did not receive chemotherapy, survivors who received chemotherapy were more likely to have a fracture; this association was stronger within ﬁve years of diagnosis, but still suggestive ﬁve years after diagnosis. The study also showed that physical activity may be associated with lower risk and current smoking was associated with a higher risk of fracture among cancer survivors 5 or more years post-diagnosis.
“We hope our ﬁndings will inform clinical guidance on fracture prevention, which could incorporate physical activity with exercise cancer professionals and smoking cessation programs, to improve quality of life after a cancer diagnosis,” added Dr Rees-Punia.
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