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Nivolumab Rechallenge After Immune-related Adverse Events in Patients With Unresectable Advanced or Recurrent Esophageal Cancer.
In Vivo 2024
BACKGROUND/AIM: Rechallenge with immune checkpoint inhibitors following immune-related adverse events (irAEs) during the treatment of certain cancers reportedly has good efficacy. However, the subsequent clinical course of esophageal cancer remains unclear. This study investigated the nature of irAEs and the efficacy of a nivolumab rechallenge for patients with esophageal cancer.
PATIENTS AND METHODS: This study retrospectively analyzed 44 patients with unresectable advanced or recurrent esophageal cancer who were treated with nivolumab as a second-line or later regimen and developed irAEs between February 2020 and May 2022. The cohort was divided into continuation, rechallenge, and discontinuation groups based on nivolumab administration after the occurrence of irAEs. The proportion of each group was investigated according to the type of irAEs. The progression-free and overall survival periods were retrospectively analyzed for each group.
RESULTS: Among patients with skin-related irAEs, 78.6% continued nivolumab administration, 14.3% rechallenged, and 7.1% discontinued nivolumab. Among patients with gastrointestinal disorders, 30.8% continued, 46.2% rechallenged, and 23.1% discontinued nivolumab. Among patients with interstitial pneumonia, none continued, 55.6% rechallenged, and 44.4% discontinued nivolumab. In those with endocrine disorders, 83.3% continued, none rechallenged, and 16.7% discontinued nivolumab. The median progression-free survival after irAE occurrence in the continuation, rechallenge, and discontinuation groups was 210, 333, and 72.5 days, respectively (p=0.022), while the median overall survival after irAE occurrence was 714, 848, and 223 days, respectively (p=0.008).
CONCLUSION: Rechallenge with nivolumab may be considerably effective, depending on the type and severity of irAEs, and may improve the prognosis of patients with unresectable advanced or recurrent esophageal cancer.
PATIENTS AND METHODS: This study retrospectively analyzed 44 patients with unresectable advanced or recurrent esophageal cancer who were treated with nivolumab as a second-line or later regimen and developed irAEs between February 2020 and May 2022. The cohort was divided into continuation, rechallenge, and discontinuation groups based on nivolumab administration after the occurrence of irAEs. The proportion of each group was investigated according to the type of irAEs. The progression-free and overall survival periods were retrospectively analyzed for each group.
RESULTS: Among patients with skin-related irAEs, 78.6% continued nivolumab administration, 14.3% rechallenged, and 7.1% discontinued nivolumab. Among patients with gastrointestinal disorders, 30.8% continued, 46.2% rechallenged, and 23.1% discontinued nivolumab. Among patients with interstitial pneumonia, none continued, 55.6% rechallenged, and 44.4% discontinued nivolumab. In those with endocrine disorders, 83.3% continued, none rechallenged, and 16.7% discontinued nivolumab. The median progression-free survival after irAE occurrence in the continuation, rechallenge, and discontinuation groups was 210, 333, and 72.5 days, respectively (p=0.022), while the median overall survival after irAE occurrence was 714, 848, and 223 days, respectively (p=0.008).
CONCLUSION: Rechallenge with nivolumab may be considerably effective, depending on the type and severity of irAEs, and may improve the prognosis of patients with unresectable advanced or recurrent esophageal cancer.
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