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Erschienen in: Journal of Neuro-Oncology 3/2021

02.06.2021 | Clinical Study

What does a non-response to induction chemotherapy imply in high-risk medulloblastomas?

verfasst von: Jihane Adelon, Christelle Dufour, Stéphanie Foulon, Julien Masliah Planchon, David Meyronnet, Franck Bourdeaut, Gilles Palenzuela, Fanny Fouyssac, Sandra Raimbault, Emilie De Carli, Sébastien Klein, Anne Pagnier, Anne-Isabelle Bertozzi, Angélique Rome, Audrey David, Sylvie Chabaud, Cécile Faure-Conter

Erschienen in: Journal of Neuro-Oncology | Ausgabe 3/2021

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Abstract

Purpose

High-risk medulloblastomas (HR-MB) may not respond to induction chemotherapy, with either post-induction stable (SD) or progressive disease (PD). There is no consensus regarding their optimal management.

Methods

A retrospective, multicentre study investigated patients with non-responder HR-MB treated according to the PNET HR + 5 protocol (NCT00936156) between 01/01/2009 and 31/12/2018. After two courses of etoposide and carboplatin (induction), patients with SD or PD were analyzed. Upon clinician’s decision, the PNET HR + 5 protocol was either pursued with tandem high-dose chemotherapy (HDCT) and craniospinal irradiation (CSI) (continuation group) or it was modified (switched group).

Results

Forty-nine patients were identified. After induction, 37 patients had SD and 12 had PD. The outcomes were better for the SD group: the 5-y PFS and OS were 52% (95% CI 35–67) and 70% (95% CI 51–83), respectively, in the SD group while the 2-y PFS and OS were 17% (95% CI 3–41) and 25% (95% CI 6–50), respectively, in the PD group (p < 0.0001). The PNET HR + 5 strategy was pursued for 3 patients in the PD group, of whom only one survived. In the SD group, it was pursued for 24/37 patients whereas 13 patients received miscellaneous treatments including a 36 Gy CSI in 12 cases. Despite that continuation and switched group were well-balanced for factors impacting the outcomes, the latter were better in the continuation group than in the switched group: the 5-y PFS were 78% (95% CI 54–90) versus 0% (p < 0.001), and the 5-y OS were 78% (95% CI 54–90) versus 56% (95% CI 23–79) (p = 0.0618) respectively. In the SD group, multivariate analysis revealed that MYC amplification, molecular group 3, and a switched strategy were independent prognostic factors for progression.

Conclusion

Patients with post-induction SD may benefit from HDCT and CSI, whereas patients with early PD will require new therapeutic approaches.
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Metadaten
Titel
What does a non-response to induction chemotherapy imply in high-risk medulloblastomas?
verfasst von
Jihane Adelon
Christelle Dufour
Stéphanie Foulon
Julien Masliah Planchon
David Meyronnet
Franck Bourdeaut
Gilles Palenzuela
Fanny Fouyssac
Sandra Raimbault
Emilie De Carli
Sébastien Klein
Anne Pagnier
Anne-Isabelle Bertozzi
Angélique Rome
Audrey David
Sylvie Chabaud
Cécile Faure-Conter
Publikationsdatum
02.06.2021
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 3/2021
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-021-03777-9

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