Kaplan–Meier survival curve analysis (Supplementary Fig. S1B) indicated that in our study, DLBCL patients with positive PTGDS displayed reduced progression-free survival (29 months vs. 55 months, p = 0.003) and overall survival (31 months vs. 62 months, p = 0.001). The gene discussed is PTGDS; the disease is diffuse large B-cell lymphoma.