INTRODUCTION

The outcomes of refractory or relapsed diffuse large B-cell lymphoma are generally poor, especially those relapsed or progressed within 12 months from diagnosis named as early chemoimmunotherapy failure (ECF), with a 2-year OS of 24.7%. Due to the dismal outcome, early recognition of ECF and developing targeted innovative treatments to improve patient prognosis are urgent.

METHODS

This study recruited 2038 newly diagnosed DLBCL patients treated with R-CHOP/RminiCHOP or R-CHOP-based immunochemotherapy in Ruijin hospital and 411 hospital from December 1997 to December 2020.

RESULTS

Compared to the control group, ECF patients were significantly associated with elderly age, advanced Ann Arbor stage, elevated serum LDH, poor performance status, multiple extranodal involvements, double expressor lymphoma (DEL), and non-GCB subtype, as well as high frequencies of , and mutations. Through multivariate analysis, elderly age, advanced stage, elevated serum LDH, DEL, and mutations of or were independent predictors of ECF.

DISCUSSION

Based on these predictors, a nomogram of ECF was established, and the straining cohort of our Chinese patients as well as the external cohort from Western countries showed a good predictive power of the ECF model, indicating the efficiency of our ECF predicting model, regardless of patients' race. Our ECF model allows clinicians to early recognize ECF patients, to optimize the therapeutic strategies and to improve the outcome of those chemo-resistant patients.