Immune Checkpoint Inhibitor–Associated Remitting Seronegative Symmetrical Synovitis With Pitting Edema: Description of a New Entity by CanRIO

J RheumatolPublished Case series

Authors' conclusion

ICI-RS3PE may be an independent Rh-irAE, separate from paraneoplastic RS3PE. The symptoms of ICI-RS3PE responded well to glucocorticoids, but concomitant treatment with csDMARDs may be necessary.

Study context

Population
Adult patients with rheumatic immune-related adverse events (irAEs) in the CanRIO network of Canadian rheumatologists
Participants
11 patients
Outcome
Characteristics of ICI-RS3PE cases
Methodological detailsmulticentre, retrospective and prospective cohorts
  • Multicentre
  • Retrospective and prospective cohorts

Main finding

As reported in the abstract

Nonsmall cell lung cancer (most frequent malignancy)
4 of 11
Malignant melanoma
2 of 11
Cutaneous squamous cell carcinoma
2 of 11
Median time to onset from ICI start
26 weeks
Median time to onset from diagnosis of malignancy
52 weeks
Stable cancer prior to onset
7
Partial response prior to onset
3
Complete response prior to onset
1
Received GC
11 (all patients)
Conventional synthetic disease-modifying antirheumatic drugs (csDMARD) needed
10

Observational data: associations, not effects.

Original publication

Immune Checkpoint Inhibitor–Associated Remitting Seronegative Symmetrical Synovitis With Pitting Edema: Description of a New Entity by CanRIO. J Rheumatol. Published 1 March 2024. doi:10.3899/jrheum.2023-0969

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