Male fertility during and after immune checkpoint inhibitor therapy: A cross-sectional pilot study

•This cross-sectional study included 25 male patients; 22 spermiograms were available.•Most patients (18/22, 82%) remained fertile, with no restrictions of spermatogenesis.•Of four patients with pathological spermiograms, three had confounding influences.•One case of new-onset, inflammatory azoospermia is presumably of autoimmune origin.•A second case of reduced sperm counts may also be treatment related.