Radiation therapy to treat uterine cancer linked with increased risk of bladder cancer later in life

Radiation therapy used to treat uterine cancer may increase a patient's risk of developing bladder cancer. That is the conclusion of a recent study published in BJU International. The findings indicate the importance of monitoring patients for potential signs of bladder cancer to ensure early diagnosis and treatment.

In the United States, is the fourth most common cancer in women, with an estimated 49,560 women diagnosed in 2013. In addition to surgery, 38 percent of undergo pelvic to decrease uterine cancer recurrence. Studies have found that women treated with radiation therapy for uterine cancer, like men who received radiation therapy for prostate cancer, have an increased risk of developing later in life.

To investigate the issue, Guan Wu, MD, PhD, of the University of Rochester Medical Center, and his colleagues analyzed the records of 56,681 patients diagnosed with uterine cancer as their first primary malignancy between 1980 and 2005. The information was obtained from the Surveillance, Epidemiology and End-Results (SEER) database.

With an average follow-up of 15 years, bladder cancer incidence in uterine cancer patients treated with pelvic radiation therapy was twice as high as that seen in patients treated without radiation. Similarly, the death rate from bladder cancer was nearly three times higher in patients treated with pelvic radiation than in those who did not receive radiation. It is commonly thought that bladder cancers that develop after pelvic radiation tend to be aggressive, with high grades and stages, but this study found that the types, grades, and stages of bladder cancer that developed were similar in patients treated with and without radiation therapy.

"Physicians who care for patients with a history of uterine cancer and pelvic radiation treatment should keep in mind the increased risk of bladder ," said Dr. Wu. "Proper clinical evaluation should be performed to avoid delayed diagnosis, which may improve the quality of care for this group of patients."

More information: "Bladder Cancer Incidence and Mortality in Patients Treated with Radiation for Uterine Cancer." Janet E. Baack Kukreja, Emil Scosyrev, Ralph A. Brasacchio, Eugene P. Toy, Edward M Messing, and Guan Wu. BJU International; 2013 (DOI: 10.1111/bju.12543).

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