hyperthyroidism

Hyperthyroidism is an endocrine disorder characterized here as an immune-related adverse event after immune checkpoint inhibitor initiation, with a real-world cohort showing a 2.2% incidence within 12 months and an association with significant mortality. In this setting, ipilimumab was linked to a higher hazard of hyperthyroidism in Cox proportional hazards modeling, and risk was also higher in patients with type 1 diabetes, while black or African American patients had a lower hazard. Clinically, the condition was managed symptomatically with beta-blockers including atenolol, metoprolol, and propranolol to control adrenergic symptoms. The main literature advance is a 2026 Journal of Oncology Pharmacy Practice cohort study (PMID:42012269) that quantified incidence, risk factors, and outcomes of immune checkpoint inhibitor-induced hyperthyroidism in routine care. Overall, this supports hyperthyroidism as a clinically important immune-related toxicity requiring monitoring after checkpoint inhibitor therapy, especially with ipilimumab exposure.

Immune checkpoint inhibitor toxicity

  • Immune checkpoint inhibitor use was associated with hyperthyroidism as an immune-related adverse event in a real-world cohort study. (PMID:42012269)
  • The reported incidence was 2.2% within 12 months after immune checkpoint inhibitor initiation. (PMID:42012269)
  • Hyperthyroidism in this context was associated with significant mortality, underscoring its clinical impact. (PMID:42012269)
  • A 2026 Journal of Oncology Pharmacy Practice study (PMID:42012269) specifically evaluated incidence, risk factors, and clinical outcomes. (PMID:42012269)

Risk factors and outcomes

  • ipilimumab showed a higher hazard for hyperthyroidism in Cox proportional hazards modeling. (PMID:42012269)
  • Type 1 diabetes was identified as a higher-risk feature for developing hyperthyroidism. (PMID:42012269)
  • Black or African American patients had a lower hazard of hyperthyroidism in the cohort analysis. (PMID:42012269)

Symptomatic treatment