Abstract
Purpose
To investigate the impact of local therapies on high-risk neuroblastoma (HR-NB) outcomes in South Africa.
Methods
Data from 295 patients with HR-NB from nine pediatric oncology units between 2000 and 2014 were analysed. All patients received chemotherapy. Five-year overall (OS) and event free survival (EFS) were determined for patients who had received local therapy, either surgery or radiotherapy or both.
Results
Surgery was performed in only 35.9% (n = 106/295) patients. Surgical excision was done for 34.8% (n = 85/244) of abdominal primaries, 50.0% (n = 11/22) of thoracic primaries; 22.2% (n = 2/9) neck primaries and 66.7% (n = 8/12) of the paraspinal primaries. Only 15.9% (n = 47/295) of all patients received radiotherapy. Children, who had surgery, had an improved five-year OS of 32.1% versus 5.9% without surgery (p < 0.001). Completely resected disease had a five-year OS of 30.5%, incomplete resections 31.4% versus no surgery 6.0% (p < 0.001). Radiated patients had a five-year OS of 21.3% versus 14.2% without radiotherapy (p < 0.001). Patients who received radiotherapy without surgical interventions, had a marginally better five-year OS of 12.5% as opposed to 5.4% (p < 0.001). Patients who underwent surgery had a longer mean overall survival of 60.9 months, while patients, who were irradiated, had a longer mean overall survival of 7.9 months (p < 0.001). On multivariate analysis, complete metastatic remission (p < 0.001), surgical status (p = 0.027), and radiotherapy status (p = 0.040) were significant predictive factors in abdominal primaries.
Conclusion
Surgery and radiotherapy significantly improve outcomes regardless of the primary tumor site, emphasizing the importance of local control in neuroblastoma.
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Abbreviations
- COG:
-
Children’s Oncology Group
- EFS:
-
Event-free survival
- FH:
-
Favorable histology
- GTR:
-
Gross total resection
- HIC:
-
High-income countries
- HR:
-
High risk
- IDRF:
-
Image define risk factors
- INSS:
-
International Neuroblastoma Staging System
- LMIC:
-
Low- and middle-income countries
- NA:
-
Not amplified
- NB:
-
Neuroblastoma
- nGTR:
-
Near gross total resection
- OS:
-
Overall survival
- PFS:
-
Progression-free survival
- PTR:
-
Primary tumor site relapse
- POUs:
-
Pediatric oncology units
- RT:
-
Radiotherapy
- STR:
-
Subtotal resection
- UH:
-
Unfavorable histology
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Acknowledgements
Dr. van Heerden, as staff member of the Department of Paediatric Haematology and Oncology, Antwerp University Hospital, University of Antwerp, acknowledges the Department for research support. The authors acknowledge the SACCSG, for supporting the study, and the South African Children’s Tumour Registry (SACTR), for providing statistical data.
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JvH conceptualized and designed the study, collected data, performed the data analysis and wrote the manuscript. MK assisted with concept development, as well as design of the study, supervised data analysis, critically reviewed and revised the manuscript. TE performed the statistical analysis. GPH, as expert pediatric surgeon, supervised the surgical content and contributed patient-related data. All other authors collected data in their respective pediatric oncology units and contributed significantly to the manuscript.
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van Heerden, J., Kruger, M., Esterhuizen, T. et al. The importance of local control management in high-risk neuroblastoma in South Africa. Pediatr Surg Int 36, 457–469 (2020). https://doi.org/10.1007/s00383-020-04627-x
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DOI: https://doi.org/10.1007/s00383-020-04627-x