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Late-Onset Immune-Related Adverse Events in Patients with Advanced Melanoma: The LATENT Study
Pozas, J. Cheruvu, S. Jaganathan, P. P. Ganesan, P. Modi, A. Larkin, J. Cossar, L. Olsson-Brown, A. Johnson, A. Garbutt, N.
Pozas, J.
Cheruvu, S.
Jaganathan, P. P.
Ganesan, P.
Modi, A.
Larkin, J.
Cossar, L.
Olsson-Brown, A.
Johnson, A.
Garbutt, N.
Abstract
BACKGROUND/OBJECTIVES: Immune checkpoint inhibitors have significantly transformed the treatment paradigm of advanced melanoma, leading to substantial improvements in survival outcomes. However, this therapeutic success is accompanied by a spectrum of treatment-related adverse events, some of which are increasingly recognised as enduring and non-reversible. Whilst early-onset immune-related toxicities have been well characterized, late-onset toxicities, often emerging in patients with long-term disease control, remain understudied and are frequently overlooked. METHODS: To address this knowledge gap, we conducted a retrospective multicentre study in three UK tertiary referral centres, exploring immune-related adverse events in 246 patients with melanoma who received immune checkpoint inhibitors in the advanced setting. We defined late-onset immune-related adverse events as those occurring at least 3 months after the last cycle of immune checkpoint inhibitors. RESULTS: Although most patients experienced early-onset toxicity, almost 15% of patients developed late-onset immune-related adverse events, including skin rash, colitis, hepatitis, and arthritis, among others. These were often challenging to manage and necessitated the use of systemic steroids. Up to 2% of patients presented ultra-late-onset toxicities, defined as those events occurring at least 12 months after treatment completion. CONCLUSIONS: This study provides valuable insights into the characteristics of late-onset immune-related adverse events. To further advance our understanding of these late-onset toxicities, dedicated prospective studies are needed to assess risk factors associated with their development and their impact on quality of life. Additionally, translational research focused on finding predictive biomarkers is essential to identify patients at a higher risk of developing delayed adverse events and to understand how best to manage them.
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Date
2025
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Citation
Pozas J, Cheruvu S, Jaganathan PP, Ganesan P, Modi A, Larkin J, et al. Late-Onset Immune-Related Adverse Events in Patients with Advanced Melanoma: The LATENT Study. Cancers (Basel). 2025 Jul 25;17(15). PubMed PMID: 40805161. Pubmed Central PMCID: PMC12346639. Epub 2025/08/14. eng.