Tislelizumab in Combination With Lenalidomide in Refractory and Relapsed Elderly Patients With Non-GCB DLBCL

Inclusion criteria

• ✓. Volunteers who signed informed consent.
• ✓. Age range 60-75 years old; male or female
• ✓. DLBCL, or follicular lymphoma grade 3B, or transformed DLBCL, EBV (+) DLBCL, ALK (+) DLBCL, high-grade lymphoma were confirmed by histopathology examination;
• ✓. Failed from standard first-line rituximab-contained chemotherapy, and relapsed or refractory after second-line regimens with or without rituximab.
• ✓. ECOG performance status 0-1.
• ✓. Estimated survival time \> 3 months.
• ✓. There must be at least one evaluate able or measurable lesion that meets the LYRIC 2016 Malignant Lymphoma criteria \[evaluable lesion: 18F-fluorodeoxyglucose/Positron Emission Tomography (18FDG/PET) examination showing increased lymph node or extranodal uptake (higher than liver) and PET and/or computed tomography (Computed Tomography) CT) features are consistent with lymphoma findings; lesions can be measured: nodular lesions \> 15mm or extranodal lesions \> 10mm (if the only measurable lesion has received radiotherapy in the past, there must be evidence of radiological progress after radiotherapy), and accompanied by increased 18FDG uptake). Except for this, there is no measurable increase in diffuse 18FDG uptake in the liver;
• ✓. Adequate organ and bone marrow function, no severe hematopoietic dysfunction, cardiac, pulmonary, liver, kidney, thyroid dysfunction and immune deficiency (no blood transfusion, granulocyte colony stimulating factor or other medical support was received within 14 days prior to the use of the research drug): 1) The absolute value of neutrophils (\>1.5×10\^9/L); 2) platelet count (\> 75×10\^9/L); 3) Hemoglobin (\> 9 g/dL); 4) Upper Limit Normal (ULN) or creatinine clearance rate (\>40 mL/min) of serum creatinine (\<1.5 times normal value upper limit) (estimated by Cockcroft-Gault formula); 5) Serum total bilirubin \< 1.5 times ULN; 6) Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT) = 2.5 times ULN; 7) Prior chemotherapy and radiotherapy should have been completed more than 4 weeks. Coagulation function: International Normalized Ratio (INR) = 1.5 times ULN; Prothrombin Time (PT), Activated Partial Thromboplastin Time (APTT) = 1.5 times ULN (unless the subject is receiving anticoagulant therapy and PT and APTT are using anticoagulant therapy at screening time). Within the expected range; 8) Thyrotropin (TSH) or free thyroxine (FT4) or free triiodothyronine (FT3) were all within the normal range (+10%);