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DOI: 10.1055/s-0038-1625111
Is there a benefit of 131I-MIBG therapy in the treatment of children with stage 4 neuroblastoma?
A retrospective evaluation of The German Neuroblastoma Trial NB97 and implications for the The German Neuroblastoma Trial NB2004Gibt es einen Nutzen durch die 131I-MIBG-Therapie bei der Behandlung von Kindern mit Neuroblastom Stadium 4?Eine retrospektive Datenanalyse der Deutschen Neuroblastom- Studie NB97 und Auswirkungen auf die Nachfolgestudie NB2004Publikationsverlauf
Received:
11. Juli 2005
in revised form:
18. 18 2006
Publikationsdatum:
10. Januar 2018 (online)
Summary
Aim: 131I-meta-iodobenzylguanidine (131I-MIBG) therapy has been used in neuroblastoma treatment for many years but its value in high intensive first line treatment protocols is not exactly known. Patients, methods: Stage 4 neuroblastoma patients >1 year with 123I-MIBG positive residual disease (primary tumour and/or metastasis) after complete induction chemotherapy according to the German neuroblastoma trial NB97 were retrospectively analyzed. Results: One-hundred-eleven patients had 123I-MIBG positive residual disease after complete induction chemotherapy. Forty patients received 131I-MIBG therapy using a median activity of 0.44 GBq/kg body weight. By univariate analysis, patients who underwent 131I-MIBG therapy had a better 3-year event free survival (3-y-EFS 46±8%) and 3-year overall survival (3-y-OS 58±9%) than 71 patients without 131I-MIBG therapy (3-y-EFS 19±5%, p=0.003; 3-y-OS 43±6%, p=0.037). However, subgroup analysis of 66 patients who underwent high dose chemotherapy with autologous stem cell transplantation (ASCT) during treatment found a very similar outcome with 131I-MIBG therapy (3-y-EFS 49±9%, 3-y-OS 59±10%) and without 131I-MIBG therapy (3-y-EFS 33±9%, p=0.171; 3-y-OS 59±9%, p=0.285) due to the dominating effect of ASCT. By multivariate analysis, 131I-MIBG therapy had no impact on EFS (p=0.494) and OS (p=0.891). Only ASCT, external beam radiation therapy and MYCN amplification were important for EFS and OS. Conclusions: An independent advantage of I-131-MIBG therapy could not be proven in this retrospective analysis. The ongoing German Neuroblastoma Trial NB2004 will address the influence of 131I-MIBG therapy with emphasis on tumour dosimetry.
Zusammenfassung
Ziel: Die Therapie mit 131I-Metaiodbenzylguanidin (131I-MIBG) wird seit Jahren zur Behandlung des Neuroblastoms praktiziert. Der Wert dieses Therapieelements im Rahmen einer hochintensiven Erstbehandlung ist nicht geklärt. Patienten, Methoden: Stadium-4-Neuroblastompatienten im Alter >1 Jahr, die am Ende der kompletten Induktionschemotherapie der Deutschen Neuroblastom- Studie NB97 noch 123I-MIBG-positives residuelles Tumorgewebe (Primärtumor und/oder Metastasen) hatten, wurden retrospektiv ausgewertet. Ergebnisse: 111 Patienten hatten 123I-MIBG-positives residuelles Tumorgewebe nach abgeschlossener Induktionschemotherapie. 40 Patienten erhielten eine 131I-MIBG-Therapie unter Verwendung einer medianen Aktivität von 0,44 GBq/kg Körpergewicht. Die univariate Analyse zeigte eine bessere 3-Jahres-Rate für das krankheitsfreie Überleben (3-y-EFS 46±8%) und für das Gesamtüberleben (3-y-OS 58±9%) für die Patienten mit 131I-MIBG-Therapie verglichen mit 71 Patienten ohne 131I-MIBG-Therapie (3-y-EFS 19±5%, p=0.003; 3-y-OS 43±6%, p=0.037). Die Subgruppenanalyse der 66 Patienten, die eine Hochdosischemotherapie mit autologer Stammzelltransplantation (ASCT) erhalten hatten, zeigten jedoch eine vergleichbares Überleben mit 131I-MIBGTherapie (3-y-EFS 49±9%, 3-y-OS 59±10%) und ohne 131I-MIBG-Therapie (3-y-EFS 33±9%, p=0.171; 3-y-OS 59±9%, p=0.285) wegen des dominierenden Effekts der ASCT. In der multivariaten Analyse hatte 131I-MIBG keinen Einfluss auf das EFS (p=0,494) oder das OS (p=0,891), wichtig waren ASCT, externe Strahlentherapie und MYCN-Amplifikation. Schlussfolgerungen: Ein unabhängiger Vorteil der 131I-MIBG-Therapie konnte in dieser retrospektiven Analyse nicht bewiesen werden. Die laufende Deutsche Neuroblastom-Studie NB2004 wird den Einfluss der 131I-MIBG-Therapie untersuchen, wobei der Tumordosimetrie ein besonderer Stellenwert zukommt.
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