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| ADR REPORT |
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| Year : 2023 | Volume
: 69
| Issue : 3 | Page : 172-175 |
Delayed immune-mediated hepatitis after three cycles of pembrolizumab for the treatment of sinonasal melanoma
S Kang1, HJ Lee2, HJ Lee1
1 Division of Hematology and Oncology, Department of Internal Medicine, Chungnam National University Hospital and College of Medicine, Daejeon, Republic of Korea
2 Department of Pathology, Chungnam National University Hospital and College of Medicine, Daejeon, Republic of Korea
Correspondence Address:
Dr. H J Lee
Division of Hematology and Oncology, Department of Internal Medicine, Chungnam National University Hospital and College of Medicine, Daejeon
Republic of Korea
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/jpgm.jpgm_834_22
Immune checkpoint inhibitors (ICIs) are monoclonal antibodies that induce the anti-tumor effects of T cells by targeting co-inhibitory immune checkpoints. The development of ICIs has revolutionized the clinical practice of oncology, leading to significant improvements in outcomes; therefore, ICIs are now standard care for various types of solid cancers. Immune-related adverse events, the unique toxicity profiles of ICIs, usually develop 4–12 weeks after initiation of ICI treatment; however, some cases can occur >3 months after cessation of ICI treatment. To date, there have been limited reports about delayed immune-mediated hepatitis (IMH) and histopathologic findings. Herein, we present a case of delayed IMH that occurred 3 months after the last dose of pembrolizumab, including histopathologic findings of the liver. This case suggests that ongoing surveillance for immune-related adverse events is required, even after cessation of ICI treatment.
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