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  • Title: Is there a benefit of 131 I-MIBG therapy in the treatment of children with stage 4 neuroblastoma? A retrospective evaluation of The German Neuroblastoma Trial NB97 and implications for The German Neuroblastoma Trial NB2004.
    Author: Schmidt M, Simon T, Hero B, Eschner W, Dietlein M, Sudbrock F, Bongartz R, Berthold F, Schicha H.
    Journal: Nuklearmedizin; 2006; 45(4):145-51; quiz N39-40. PubMed ID: 16964339.
    Abstract:
    AIM: (131)I-meta-iodobenzylguanidine ((131)I-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 (123)I-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 (123)I-MIBG positive residual disease after complete induction chemotherapy. Forty patients received (131)I-MIBG therapy using a median activity of 0.44 GBq/kg body weight. By univariate analysis, patients who underwent (131)I-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 (131)I-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 (131)I-MIBG therapy (3-y-EFS 49 +/- 9%, 3-y-OS 59 +/- 10%) and without (131)I-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, (131)I-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 (131)I-MIBG therapy with emphasis on tumour dosimetry.
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