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  • Title: Prevalence of uterine myoma detected by ultrasound examination in the atomic bomb survivors.
    Author: Kawamura S, Kasagi F, Kodama K, Fujiwara S, Yamada M, Ohama K, Oto K.
    Journal: Radiat Res; 1997 Jun; 147(6):753-8. PubMed ID: 9189176.
    Abstract:
    Benign tumors of several organs have been demonstrated to occur as late effects of atomic bomb exposure, and a recent addition to the list of affected organs is the uterus. The increased incidence of uterine myoma noted in Radiation Effects Research Foundation (RERF) Adult Health Study Report 7 (Wong et al., Radiat, Res. 135, 418-430, 1993), however, was based on self-reported information, optional gynecological examination and patient-requested ultrasound examination. Thus the possibility of dose-related bias in case detection was a serious concern. Therefore, the relationship between the prevalence of uterine myoma and dose to the uterus was examined after excluding as much bias as possible by asking all women who had undergone biennial examinations from December 1991 through December 1993 to undergo ultrasound examinations. Among 2506 female participants in Hiroshima, the uterus was visualized by ultrasound examination in 1190, and 238 were found to have uterine nodules. Multiple logistic analysis using Dosimetry System 1986 uterine doses revealed a significant dose response for the prevalence of uterine nodules. The odds ratio at 1 Gy was 1.61 (95% confidence interval: 1.12-2.31). It is unlikely that the observed relationship after adjusting for bladder filling, volume of the uterus, age and menopause status was the result of dose-related bias. These results support previous findings at RERF and provide further evidence that radiation exposure is one of the factors associated with uterine myoma.
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