Comparison Of Care Patterns For Hospitalized Immune-Related Adverse Events (Iraes) Between Melanoma Patients On Combination Immune Checkpoint Inhibitor (Ici) Therapy Versus Ici Monotherapy.

85Background: Prior clinical trials in melanoma have demonstrated higher rates of irAEs from combination ICI therapy compared to monotherapy. However, this has not been well studied in the real-world where patients often have greater co-morbidities and less organ reserve. We aim to compare irAEs hospitalizations for melanoma patients on combination vs monotherapy ICIs. Methods: We performed a single centre retrospective chart review (Princess Margaret Cancer Centre, Toronto, ON) for all melanoma patients receiving ICI as standard of care (2012-2017) admitted with irAEs. Data collected include demographics, investigations, management and outcomes of hospitalizations. Descriptive analyses were performed to characterize hospitalizations and compare between ICI combination vs monotherapy groups. Results: Among 381 melanoma patients identified on standard of care ICI, 41 (11%) were admitted …