554 Clinical outcomes of patients treated with immune checkpoint inhibitor therapy for early-stage melanoma recurrence: a retrospective cohort study oleh Nga Nguyen, Shawn Kwatra, Yevgeniy R Semenov, Kimberly Tang, Guihong Wan, Boshen Yan, Bonnie W Leung, Ahmad Rajesh, Hannah Rashdan, Jordan Phillips, Michael R Collier, Min Seok Choi, Nora A Alexander, Ruple Jairath, Mia S DeSimone