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An epidemiological survey has been carried out to establish the incidence of second malignant neoplasms in hereditary retinoblastoma survivors in The Netherlands and the relative risk of cancer in non-affected relatives. The cumulative incidence of second neoplasms was 19% at the age of 35 years. Fathers, unaffected by retinoblastoma, were at risk for pancreatic cancer, the relative risk being 8.3.
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Derkinderen et al. (1987) studied this question.
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