To evaluate the immune status and prognosis of patients with malignant hematological tumors, thereby guiding clinical therapeutic strategies.
Age ≥ 18 years; both genders included; expected survival > 3 months;
Cohort 1: Patients with newly diagnosed or relapsed B-cell lymphoma confirmed by histopathology, bone marrow pathology, flow cytometry, morphology, and genetic testing; Cohort 2: Patients with newly diagnosed or relapsed multiple myeloma confirmed by the same methods; Cohort 3: Healthy volunteers;
Able to understand and voluntarily sign the informed consent form.
Symptomatic congestive heart failure (NYHA Class II-IV), symptomatic/uncontrolled arrhythmias, congenital long QT syndrome, or corrected QT interval (QTc) >500 ms (Fridericia formula) at screening.
History of pulmonary fibrosis, interstitial pneumonia, pneumoconiosis, drug-related pneumonitis, or severely impaired lung function.
HIV infection (positive HIV-1/2 antibodies) or known syphilis infection.
Unhealed wounds, fractures, gastroduodenal ulcers, persistent fecal occult blood positivity, ulcerative colitis, or other conditions at risk of gastrointestinal bleeding/perforation (as determined by the investigator).