Currently recruiting! This is an ongoing prospective, multi-centre, Canadian study looking at clinical phenotypes, outcomes and biomarker profiles of adults with rheumatic immune related adverse events associated with cancer immunotherapies as well as patients with pre-existing autoimmune disease initiating cancer immunotherapies. Contact a CanRIO physician in your city if you are interested in being a part of this study or if you are a physician wanting to refer a patient for this study.