Treatment response in the 16 pembrolizumab-treated patients with rrPMBCL who were evaluable (by imaging) for efficacy at the time of data cutoff. (A) Best percentage change from baseline in target lesions. (Number at the end of each bar indicates the patient identification number.) (B) Transplant eligibility, treatment duration, investigator-assessed response to treatment, and duration of response. (Unless indicated otherwise, patients had stable disease.) PD, progressive disease; PR, partial response; SD, stable disease.