4-year survival and outcomes after cessation of pembrolizumab (pembro) after 2-years in patients (pts) with ipilimumab (ipi)-naive advanced melanoma in KEYNOTE-006.

9503Background: KEYNOTE-006 (NCT01866319) established superiority of pembro over ipi in advanced melanoma. We provide 4-y outcomes, long-term data for pts who completed 2 y pembro, and data for sec...