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Background: The international cooperation between GATLA and AHOPCA with the support of St. Jude led to the adoption of the OEPA/COPDAC as a strategy to improve outcomes in high risk (HR) patients with HL. This study also includes the ABVD regimen for intermediate risk (IR) and low risk (LR) patients.
Methods: Patients were stratified by predefined risk assignment. HR was defined as a disease in stages II B, III B, and IV. Modality treatment: LR: ABVD × 4 ± IFRT (20 Gy); IR: ABVD × 6 ± IFRT (20 Gy); and HR: OEPA–COPDAC + IFRT (20/25 Gy). The staging and response were reviewed in a periodic discussion of presentation of cases in the group. Eligibility for radiotherapy: LR patients in partial response (PR) after 4 ABVD and IR patients in PR after 2 ABVD received IFRT. All HR patients received IFRT at 20 (complete response (CR)) or 25 Gy (PR) depending on the response achieved after the first two OEPA cycles.
Results: From November 2012 to June 2022, 203 pediatric patients were enrolled. A total of 171 patients were eligible in this analysis. HR: 98 patients (57.3%), IR: 52 patients (30.4%), and LR: 21 patients (12.3%). More than half of the patients were in stages III and IV and more than half also presented B symptoms. The response evaluation was performed by PET/CT in 147/171 patients (86%). A total of 68/171 patients (40%) did not received radiotherapy. Radiotherapy was omitted in 95% of the LR patients and 70% of the IR patients. The 10-year OS was 95% (90.7–97.6) for the 171 patients and 93% (85.3–96.4) for HR patients. The 10-year EFS was 91% (85.2–94.2) for the 171 patients and 87.8% (79.5–92.9) for HR patients.
Conclusion: The international cooperation made it possible to significantly improve the outcomes of patients with advance disease in Argentina compared with our previous experience (7-PHD-96: COPP–ABV × 6 + IFRT Bulky Disease or PR (20/25 Gy): 5yOS: 85%, 5yEFS: 67%), reduce the number of patients who required radiotherapy, and reproduce the European experience for HR patients in a totally different context.
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; Streitenberger, Patricia 2 ; Matus, Mónica 3 ; Pedro Negri Aranguren 4 ; Costa, Alejandra 5 ; Morell, Daniela 6 ; Terrasa, Sergio 7 ; Castellanos, E Mauricio 8 ; de Alarcon, Pedro 9 ; Dibar, Eduardo 3 ; Makiya, Mónica 3 1 Hospital Universitario Austral Pilar, Buenos Aires Argentina
2 Hospital Italiano de Buenos Aires Buenos Aires Argentina
3 Grupo Argentino Para el Tratamiento de Leucemias Agudas GATLA Buenos Aires Argentina
4 Hospital Materno Infantil San Roque Paraná Entre Ríos, Argentina
5 Hospital de Niños Sor María Ludovica La Plata Argentina
6 Hospital Infantil de Córdoba Córdoba Argentina
7 Departamento de Investigaciones Hospital Italiano de Buenos Aires Buenos Aires Argentina
8 AHOPCA Unidad Nacional Oncología Pediátrica Guatemala City Guatemala
9 Department of Pediatrics University of Illinois College of Medicine Peoria Illinois, USA