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  • Title: Risk of second malignancies in long-term survivors of childhood cancer.
    Author: Cardous-Ubbink MC, Heinen RC, Bakker PJ, van den Berg H, Oldenburger F, Caron HN, Voûte PA, van Leeuwen FE.
    Journal: Eur J Cancer; 2007 Jan; 43(2):351-62. PubMed ID: 17141498.
    Abstract:
    INTRODUCTION: Childhood cancer survivors are known to be at increased risk for second malignancies. PATIENTS AND METHODS: The risk of second malignancies was assessed in 1368 5-year survivors of childhood cancer treated in the Emma Children's Hospital AMC in Amsterdam. The median follow-up time was 16.8 years. RESULTS: Sixty two malignancies were observed against 5.4 expected, yielding a standardised incidence ratio (SIR) of 11.2 (95% confidence interval: 8.53-14.4; absolute excess risk: 3.2 per 1000 person-years). New observations were the strongly increased risks of meningiomas (SIR=40) and basal cell carcinomas (SIR=9). Patients whose treatment involved radiotherapy had a 2-fold increased second cancer risk compared to patients with chemotherapy alone. DISCUSSION: The relative risk of second malignancies does not decrease till at least 30 years of follow-up. With aging of the survivor cohort this results in a strong increase of the AER, due to the rising background risk of cancer with age.
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