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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 1/2019

27.07.2018 | Original Article

Prognostic significance of normalized FDG-PET parameters in patients with multiple myeloma undergoing induction chemotherapy and autologous hematopoietic stem cell transplantation: a retrospective single-center evaluation

verfasst von: Daria Ripani, Carmelo Caldarella, Tommaso Za, Daniele Antonio Pizzuto, Elena Rossi, Valerio De Stefano, Alessandro Giordano

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 1/2019

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Abstract

Purpose

The purpose of this study was to determine retrospectively, through a single-center evaluation, whether FDG PET-CT normalized semi-quantitative parameters may predict response to induction chemotherapy (iChT) and hematopoietic stem cell transplantation (HSCT), as well as disease progression and progression-free survival in multiple myeloma (MM) patients, thus becoming a tool of personalized medicine.

Methods

Patients undergoing iChT and HSCT with baseline and post-treatment FDG PET-CTs from January 2008 to July 2015 were included. The following baseline and post-treatment parameters were obtained: SUVmax, SUVmean, SUVpeak, MTVsum, TLGsum, rPET (lesion SUVmax/liver SUVmax) and qPET (lesion SUVpeak/liver SUVmean). Baseline-to-post-treatment changes (Δ) were also calculated. Metabolic and clinical laboratory progression or response at follow-up were noted; time-to-metabolic-progression (TMP) was defined as the interval from post-treatment scan to eventual progression at follow-up FDG PET-CTs. Possible association between each functional parameter and metabolic/clinical-laboratory progression or response was determined. Kaplan-Meier curves allowed to depict the TMP trend according to FDG PET-CT parameters.

Results

Twenty-eight patients were included. Significantly higher ΔrPET and ΔqPET values were observed in ten patients with “metabolic response”, with respect to 18 patients having “metabolic progression” (median 0.62 [IQR 0.32 – 1.34] vs median 0.00 [IQR -0.25 – 0.49] for ΔrPET; P = 0.045; median 0.51 [IQR 0.32 – 1.13] vs median 0.00 [IQR -0.31 – 0.67] for ΔqPET; P = 0.035). Neither normalized nor non normalized parameters differed significantly between the 20 patients with “clinical-laboratory response” and the eight patients with “clinical-laboratory progression”. ΔrPET value lower than 0.38 and ΔqPET value lower than 0.27 predicted a significantly shorter TMP (P = 0.003 and P = 0.005, respectively).

Conclusions

Normalized semi-quantitative parameters are effective in predicting persistent response to treatment and shorter TMP in patients with MM undergoing iChT and HSCT.
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Metadaten
Titel
Prognostic significance of normalized FDG-PET parameters in patients with multiple myeloma undergoing induction chemotherapy and autologous hematopoietic stem cell transplantation: a retrospective single-center evaluation
verfasst von
Daria Ripani
Carmelo Caldarella
Tommaso Za
Daniele Antonio Pizzuto
Elena Rossi
Valerio De Stefano
Alessandro Giordano
Publikationsdatum
27.07.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 1/2019
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-018-4108-y

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