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Iodine-123 metaiodobenzylguanidine scintigraphy scoring allows prediction of outcome in patients with stage 4 neuroblastoma: results of the Cologne interscore comparison study.

Authors :
Decarolis B
Schneider C
Hero B
Simon T
Volland R
Roels F
Dietlein M
Berthold F
Schmidt M
Source :
Journal of clinical oncology : official journal of the American Society of Clinical Oncology [J Clin Oncol] 2013 Mar 01; Vol. 31 (7), pp. 944-51. Date of Electronic Publication: 2013 Jan 22.
Publication Year :
2013

Abstract

Purpose: Radioiodinated metaiodobenzylguanidine ((123)I-mIBG) scintigraphy is an established imaging method in neuroblastoma. Semiquantitative scoring systems have been developed to assess the extent of disease and response to chemotherapy. We present the results of the comparison between the SIOPEN [International Society of Pediatric Oncology Europe Neuroblastoma Group] score and the modified Curie score.<br />Patients and Methods: We retrospectively analyzed 147 mIBG scans of 58 patients older than 1 year of age with stage 4 neuroblastoma from German Neuroblastoma Trial NB97 that were assessed according to the SIOPEN and the Curie scoring method. mIBG examinations were performed at diagnosis and after four and six cycles of chemotherapy.<br />Results: Scoring results were highly correlated between both methods, and interobserver reliability was excellent. A Curie score ≤ 2 and a SIOPEN score ≤ 4 (best cutoff) at diagnosis were correlated to significantly better event-free and overall survival compared with higher scores. After four cycles of chemotherapy, overall survival was significantly better for mIBG-negative patients compared with those with any residual mIBG-positive metastases. After six cycles of chemotherapy, there was no difference in survival between mIBG-negative patients and patients with residual mIBG-positive metastases. Patients without mIBG-positive metastases after four and six cycles of chemotherapy had a better overall survival, but late clearance of mIBG-positive metastases did not improve outcome.<br />Conclusion: Higher mIBG scores at diagnosis and occurrence of any residual mIBG-positive metastases after four cycles of chemotherapy predicted unfavorable outcome for patients with stage 4 neuroblastoma. Later clearance of metastases did not improve prognosis. The Curie and the SIOPEN score were equally reliable and predictive.

Details

Language :
English
ISSN :
1527-7755
Volume :
31
Issue :
7
Database :
MEDLINE
Journal :
Journal of clinical oncology : official journal of the American Society of Clinical Oncology
Publication Type :
Academic Journal
Accession number :
23341514
Full Text :
https://doi.org/10.1200/JCO.2012.45.8794