Nighty-five AM patients received at least one dose of anti-PD1 monotherapy...ORR was 28% (complete response 11%; partial response 18%). Median PFS and OS in patients with first-line treatment were 5.5 months (95% CI 3.5-8.4) and 14 months (95% CI 9.3-25.0)....elevated LDH levels, liver metastasis and brain metastasis were significantly associated with lower OS.