Real-World Effectiveness and Safety of Glofitamab in Primary Refractory and Early Relapsed Diffuse Large B-Cell Lymphoma

This is a prospective, observational, non-interventional real-world study that will not alter participants' routine clinical care. Approximately 20 eligible patients with diffuse large B-cell lymphoma (DLBCL) will be enrolled. Treatment decisions will be made by the treating physician based on standard clinical practice and may include glofitamab monotherapy or glofitamab-based combination regimens, such as glofitamab plus gemcitabine and oxaliplatin (Glofit-GemOx) or glofitamab plus polatuzumab-based therapy (Glofit-Pola). The study will collect baseline characteristics (including age, sex, medical history, and molecular subtype), treatment information, laboratory test results, adverse events, and survival follow-up data. Circulating tumor DNA (ctDNA) testing will be performed to assess minimal residual disease (MRD) in peripheral blood. When clinically indicated, cerebrospinal fluid samples may be collected to measure drug concentration. All personal information will be kept strictly confidential. Identifiable information will be removed and replaced with coded study numbers. Medical records will be maintained at the study site and accessed only by authorized research personnel. Representatives from the sponsor, ethics committee, or regulatory authorities may review study records as required. Study results will be published in aggregated form without including any information that could identify individual participants. Study data and personal information will be used solely for research purposes.