From the Journals

Immunotherapy regimen influences inflammatory arthritis presentation



Variations in the clinical presentation of immunotherapy-induced inflammatory arthritis is partly explained by which treatment regimen was used to treat the cancer, a single-center study suggests.

While immune checkpoint inhibitors (ICI) have revolutionized the field of oncology, their use for an ever-widening range of indications had created an increasing population of patients referred to rheumatologists for the management of immune-related adverse events (IrAEs), according to Laura C. Cappelli, MD, and her colleagues at John Hopkins University, Baltimore.

Well-established guidelines exist for managing adverse events such as colitis and pneumonitis, but there are only preliminary guidelines for evaluating and treating immunotherapy-induced inflammatory arthritis (IA). “This may stem from a lack of consistent reporting of rheumatologic IrAEs in clinical trials, the non–life threatening nature of [inflammatory arthritis], or lack of recognition of musculoskeletal symptoms by treating providers,” they wrote in Seminars in Arthritis and Rheumatism.

Clinical trials have reported ranges of arthralgia in 1%-43% of patients treated with ICIs, but no accurate estimate of the incidence of IA exists.


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