Retrospective study of cancer pts Rx w/ ICI and autoimmune Ab (ANA, RF, CCP, SSA/SSB, ANCA) 👉152 pts 👉59% had irAE 👉preICI Ab+⬆️odds of irAE (OR 17.5 95% CI 1.76-174, p=0.015) 👉strong assc b/t +RF and +CCP for ICD-arthritis #ACR21 Abst#0440 @Rheumnow https://t.co/kUv5ddSAnY