Safety and Efficacy of Autologous NK Cell Adjuvant Therapy for Relapsed/Refractory Non-Hodgkin's B-cell Lymphoma

Inclusion Criteria: Patients with age 15 years to 80 years, with life expectancy greater than 6 months. Pathologically confirmed non-Hodgkin B-cell lymphoma, confirmed by pathological examination at a grade A class 3 hospital or above, with pathology reported less than 3 years ago. First diagnosed relapsed/refractory non-Hodgkin's B-cell lymphoma. ECOG scores were 0 to 2 Presence of at least one CT measurable lesion locus with a maximum transverse diameter of ≥1.5 cm before inclusion in the study. For women of childbearing potential, a negative pregnancy test must be confirmed before inclusion in the study and no intention to have children within 2 years. For men of childbearing potential, inform and require the use of an effective barrier contraceptive method. Volunteer to participate in the trial and sign the informed consent form. Exclusion Criteria: Presence of bone marrow or/and central nervous system lymphoma. Patients with less than 5% peripheral blood NK cell percentage and pre-culture failure. Combined with other malignancies. Fever of non-disease-related origin within the last 5 days. Presence of uncontrollable bacterial, fungal, viral or other infections. Patients with HIV, TP positive Patients with severe cardiopulmonary, hepatic and renal, and cerebral dysfunction are present. Presence of other serious diseases that conflict with this protocol, such as autoimmune diseases, immunodeficiencies, severe thrombocytopenia, platelet dysfunction syndrome, etc. Received any form of organ transplantation, including allogeneic stem cell transplantation. Presence of a serious psychiatric disorder. Inability to communicate normally and incapacitation make it difficult to assess the safety and effectiveness of treatment. Pregnant or lactating women. The researchers deemed unsuitable for participation in this study. -