CD19 and diffuse large B-cell lymphoma: In other cases of pembrolizumab (2 mg/kg) on day 26 [101] or nivolumab (3 mg/kg) treatment on day 11 [102] for progressive DLBCL after anti-CD19 CAR T cell therapy rapid responses were seen and further assessment showed a drastically increased CAR T cell number after PD-1 blockade when compared to patients not receiving CI.