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Mass screening for neuroblastoma at 6 months of age: difficult to justify
Insights
Mass screening for neuroblastoma in Japan at 6 months of age did not reduce incidence or mortality. This study found no substantial improvement in prognosis for neuroblastoma patients identified through this screening program.
Area of Science:
- Pediatric Oncology
- Public Health Screening
- Epidemiology
Background:
- Population-based statistical analyses of neuroblastoma mass screening in Japan are rare.
- Evaluating the effectiveness of early childhood cancer screening programs is crucial for public health.
Purpose of the Study:
- To retrospectively assess the effectiveness of mass screening for neuroblastoma at 6 months of age in Japan.
- To determine if mass screening impacts neuroblastoma incidence and mortality rates in young children.
Main Methods:
- Analysis of neuroblastoma case data from the Committee for Pediatric Solid Malignant Tumors in the Kyushu area.
- Comparison of screened versus unscreened populations to evaluate screening outcomes.
Main Results:
- No significant difference in cumulative mortality rates for neuroblastoma was observed between screened and unscreened children under 5 years of age.
- The majority of neuroblastoma cases detected by screening had a favorable prognosis.
- Screening at 6 months of age did not substantially improve outcomes for unfavorable neuroblastoma identified after 1 year of age.
Conclusions:
- Mass screening for neuroblastoma at 6 months of age in Japan did not effectively reduce disease incidence or mortality.
- The current screening strategy does not significantly improve the prognosis for patients with unfavorable neuroblastoma.
- Further evaluation of screening protocols for neuroblastoma is warranted.
Background/Purpose:
A statistical analysis of the mass screening for neuroblastoma in Japan based on a population study rarely has been reported. This study aims to evaluate retrospectively the effectiveness of mass screening at 6 months of age using the available population data.
Methods:
The data on the neuroblastoma cases registered by the Committee for Pediatric Solid Malignant Tumors in the Kyushu area were analyzed based on both screened and unscreened populations in the Kyushu area.
Results:
From 1988 to 1992, the cumulative incidence of neuroblastoma in children less than 5 years of age was 82 in 484,599 for screened children, and 11 in 92,966 for unscreened children, respectively. Fourteen of the 82 screened patients had negative findings at 6 months of age (MS-negative cases). No significant difference was observed in the cumulative mortality rates from neuroblastoma in children younger than 5 years of age between the screened children and the unscreened children. Six of seven patients who died among the screened children were MS-negative cases with stage III or IV disease. In addition, no significant difference was found in the cumulative mortality rates from the neuroblastoma cases in patients less than 5 years of age between the children screened from 1988 to 1992 (7 of 484,599) and all children from 1980 to 1984 (14 of 668,084).
Conclusions:
These findings suggests that the majority of the patients detected by mass screening had a favorable prognosis, and, mass screening in Japan for children less than 6 months of age was not observed to reduce the incidence and mortality from neuroblastoma. Therefore, mass screening at 6 months of age was not found to improve substantially the prognosis of patients with unfavorable neuroblastoma identified over 1 year of age, which is the primary purpose of such mass screening for neuroblastoma.