High-dose 131 I-metaiodobenzylguanidine therapy in patients with high-risk neuroblastoma in Japan

Annals of Nuclear Medicine(2020)

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摘要
Objective The aim of the study was to investigate the outcomes and prognostic factors of high-dose 131 I-metaiodobenzylguanidine ( 131 I-MIBG) therapy in patients with refractory or relapsed neuroblastoma (NBL) in Japan. Methods We retrospectively analyzed 20 patients with refractory or relapsed high-risk NBL who underwent 131 I-MIBG therapy with an administration dose ranging from 444 to 666 MBq/kg at Kanazawa University Hospital, Japan, between September 2008 and September 2013. We focused on measurements regarding their initial responses, prognostic factors, survivals, and toxicities following 131 I-MIBG therapy using our hospital data and questionnaires from the hospitals that these patients were initially referred from. Furthermore, we performed Kaplan–Meier survival analysis to evaluate event-free survival (EFS) and overall survival (OS). Results In 19 patients with complete follow-up data, the median age at first 131 I-MIBG treatment was 7.9 years (range 2.5–17.7 years). Following 131 I-MIBG therapy, 17 of the 19 patients underwent stem-cell transplantations, and their treatment response was either complete (CR) or partial (PR) in three and two cases, respectively. The EFS and OS rates at 1 year following 131 I-MIBG therapy were 42% and 58%, respectively, and those at 5 years following 131 I-MIBG therapy were 16% and 42%, respectively. Using the two-sample log-rank test, the OS time following 131 I-MIBG therapy was significantly longer for < 3-year time interval between the initial diagnosis and 131 I-MIBG therapy ( p = 0.017), Curie score < 16 just before 131 I-MIBG therapy ( p = 0.002), without pain ( p = 0.002), without both vanillylmandelic acid (VMA) and homovanillic acid (HVA) elevation ( p = 0.037) at 131 I-MIBG therapy, and with CR or PR following 131 I-MIBG therapy ( p = 0.015). Although severe hematological toxicities were identified in all 19 patients, severe nonhematological toxicity was not recorded in any patient, except for one patient with grade 3 anorexia and nausea. Conclusions High-dose 131 I-MIBG therapy in patients with refractory or relapsed high-risk NBL can provide a favorable prognosis without severe nonhematological toxicities. Better prognosis may be anticipated in patients with the initial good response, no pain at 131 I-MIBG therapy, no VMA and HVA elevation at 131 I-MIBG therapy, low Curie score (< 16) just before 131 I-MIBG therapy, and short time interval (< 3 years) between the initial diagnosis and 131 I-MIBG therapy.
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关键词
131I-metaiodobenzylguanidine, Refractory neuroblastoma, Relapsed neuroblastoma, Internal radiation therapy, Radionuclide therapy
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