What question did this study set out to answer?

This research investigates the safety and efficacy of different siltuximab dosing frequencies in patients with idiopathic multicentric Castleman disease (iMCD).

May 11, 2026American Journal of HematologyOpen Access

Real‐World Usage and Outcomes of Different Siltuximab Dosing Frequency in Idiopathic Multicentric Castleman Disease

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This research investigates the safety and efficacy of different siltuximab dosing frequencies in patients with idiopathic multicentric Castleman disease (iMCD).
Retrospective single-institution analysis of 26 iMCD patients receiving siltuximab.
Evaluation of clinical responses categorized as complete, partial, stable, and progressive disease.
Statistical comparisons of failure-free survival (FFS) between standard and de-escalated dosing groups.
60% of patients on de-escalated dosing achieved complete response (CR) and 30% achieved partial response (PR).
Durable response was seen in all de-escalated regimens compared to 55% in standard regimens (p = 0.014).
No difference in FFS between de-escalated and standard dosing groups (hazard ratio 0.35, 95% CI 0.040–3.0; p = 0.34).

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Implication

Retrospective analysis shows de-escalated siltuximab maintains responses in iMCD patients, suggesting treatment intensity reduction may be safe.

Cite This Study

Nishimura et al. (2026) studied this question.

synapsesocial.com/papers/6a0172233a9f334c282723ae https://doi.org/10.1002/ajh.70352

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Implication

Retrospective analysis shows de-escalated siltuximab maintains responses in iMCD patients, suggesting treatment intensity reduction may be safe.

Real‐World Usage and Outcomes of Different Siltuximab Dosing Frequency in Idiopathic Multicentric Castleman Disease

Key Points

Discussion

Implication

Cite This Study

Real‐World Usage and Outcomes of Different Siltuximab Dosing Frequency in Idiopathic Multicentric Castleman Disease

Key Points

Discussion

Implication

Cite This Study

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