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The Inter-Regional Epidemiological Study of Childhood Cancer included 43 cases of soft tissue and 30 cases of bone sarcomas, together with their 146 matched controls. Analysis of a wide range of aetiological factors revealed few risk factors relating to events during the index pregnancy, the earlier medical experiences of the case child, or parental medical, occupational and smoking history. Associations which did emerge included: lower birth weight in children with Ewing's tumour, an excess of mothers of children with soft tissue sarcoma with symptoms of toxaemia in pregnancy; and more children with rhabdomyosarcoma who received antibiotics soon after birth. There was some evidence that mothers of children with soft tissue sarcoma may have had reduced fertility with a significant excess of the case mothers having no other pregnancies. Slight excesses of congenital malformations in the case children and of malignant and benign/borderline neoplastic disease in the older mothers were consistent with the existence of a degree of genetic predisposition in the development of the tumours in this series.

The Inter-Regional Epidemiological Study of Childhood Cancer (IRESCC): case control study of children with bone and soft tissue sarcomas