[Cancer in siblings of children with cancer]. / Cancer hos søskende til børn med cancer.
Ugeskr Laeger
; 164(23): 3073-9, 2002 Jun 03.
Article
em Da
| MEDLINE
| ID: mdl-12082866
ABSTRACT
INTRODUCTION:
In some rare inherited disorders, such as Li-Fraumeni syndrome, relatives of children with cancer are at increased risk of cancer. We aimed to assess relations between childhood cancer and sibling risk, and evaluate the influence of recessive conditions in cancer causation. MATERIAL ANDMETHODS:
We did a population-based cohort study in the Nordic countries of 42,277 siblings of 25,605 children with cancer. Children with cancer were identified from records in the five Nordic cancer registries, and their siblings from nationwide population registries. Cancers in siblings were documented through record linkage with cancer registries and compared with national incidence rates. We also assessed cancer incidence in parents to identify familial cancer syndromes.RESULTS:
284.2 cancers were expected in siblings, whereas 353 were diagnosed (standardised incidence ratio 1.24 95% CI, 1.12-1.38). Risk ratios for siblings were highest in the first decade of life (2.59; 1.89-3.46). We excluded 56 families with genetic syndromes linked to cancer, which reduced this ratio from 1.7 to 1.0 (0.7-1.3) for siblings younger than 20 years and from 1.3 to 1.0 (0.8-1.3) for those aged 20-29 years. We found no new patterns of familial cancer that indicated inherited susceptibility, or evidence that recessive conditions might contribute to cancers not explained by syndromes. 40% of cancers in siblings that occurred before age 20 years could be attributed to known genetic factors, whereas 60% remained unexplained.DISCUSSION:
Apart from rare cancer syndromes, paediatric cancer is not an indicator of increased risk in siblings.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Predisposição Genética para Doença
/
Neoplasias
Tipo de estudo:
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adolescent
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Adult
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Child
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Child, preschool
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Female
/
Humans
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Infant
/
Male
País/Região como assunto:
Europa
Idioma:
Da
Ano de publicação:
2002
Tipo de documento:
Article