Survival and treatment outcomes in 65 patients with Sézary syndrome who were treated with ECP. Kaplan-Meier curves demonstrating survival and treatment outcomes in our patient cohort. (A) Of the 65 patients who underwent ECP, there was no significant difference in predicted OS between the whole cohort and those who did not receive stem cell transplant (P = .78). Those who used ECP alone demonstrated significantly better TTNT outcomes compared with IFN-α alone (P = .0067) (B), HDACi alone (P = .0003) (C), and chemotherapy alone (P < .0001) (D).