OBJECTIVES: This study evaluates current trends in incidence, clinical outcomes and factors predictive of survival in children with hepatoblastoma (HB). METHODS: The Surveillance, Epidemiology and End Results (SEER) database was queried for the period 1973-2009 for all patients aged <20 years with HB. RESULTS: A total of 606 patients were identified. The age-adjusted incidence was 0.13 patients per 100 000 in 2009. An annual percentage change of 2.18% (95% confidence interval (CI) 1.10-3.27; P < 0.05) was seen over the study period. Overall survival rates at 5, 10 and 20 years were 63%, 61% and 59%, respectively. Ten-year survival rates significantly improved in patients with resectable disease who underwent operative treatment in comparison with those with non-resectable HB (86% versus 39%; P < 0.0001). Multivariate analysis showed surgical treatment (hazard ratio (HR) = 0.23, 95% CI 0.17-0.31; P < 0.0001), Hispanic ethnicity (HR = 0.61, 95% CI 0.43-0.89; P = 0.01), local disease at presentation (HR = 0.43, 95% CI 0.29-0.63; P < 0.0001) and age < 5 years (HR = 0.63, 95% CI 0.41-0.95; P < 0.03) to be independent prognostic factors of survival. CONCLUSIONS: The incidence of paediatric HB has increased over time. Hepatoblastoma is almost exclusively seen in children aged < 5 years. When HB presents after the age of 5 years, the prognosis is most unfavourable. Tumour extirpation markedly improves survival in paediatric patients with local disease.
OBJECTIVES: This study evaluates current trends in incidence, clinical outcomes and factors predictive of survival in children with hepatoblastoma (HB). METHODS: The Surveillance, Epidemiology and End Results (SEER) database was queried for the period 1973-2009 for all patients aged <20 years with HB. RESULTS: A total of 606 patients were identified. The age-adjusted incidence was 0.13 patients per 100 000 in 2009. An annual percentage change of 2.18% (95% confidence interval (CI) 1.10-3.27; P < 0.05) was seen over the study period. Overall survival rates at 5, 10 and 20 years were 63%, 61% and 59%, respectively. Ten-year survival rates significantly improved in patients with resectable disease who underwent operative treatment in comparison with those with non-resectable HB (86% versus 39%; P < 0.0001). Multivariate analysis showed surgical treatment (hazard ratio (HR) = 0.23, 95% CI 0.17-0.31; P < 0.0001), Hispanic ethnicity (HR = 0.61, 95% CI 0.43-0.89; P = 0.01), local disease at presentation (HR = 0.43, 95% CI 0.29-0.63; P < 0.0001) and age < 5 years (HR = 0.63, 95% CI 0.41-0.95; P < 0.03) to be independent prognostic factors of survival. CONCLUSIONS: The incidence of paediatric HB has increased over time. Hepatoblastoma is almost exclusively seen in children aged < 5 years. When HB presents after the age of 5 years, the prognosis is most unfavourable. Tumour extirpation markedly improves survival in paediatric patients with local disease.
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