Hematological diseases are disorders of the blood and hematopoietic organs. The current hematological cohorts are mostly based on single-center or multi-center cases, or cohorts with limited sample size in China. There is a lack of comprehensive and large-scale prospective cohort studies in hematology. The objectives of this study are to investigate the incidence and risk factors of large granular lymphocytic leukemia (LGLL) and to analyze the treatment effectiveness, patient prognosis, and healthcare costs in China. 1. Analyze the demographic and clinical characteristics of patients with LGLL, including sex, age, disease severity, and other relevant factors. 2. Examine disease features of LGLL patients, such as biochemical and hematological indicators, LGL counts, clonality, bone marrow pathology, and cytogenetics 3. Assess treatment patterns and real-world effectiveness in LGLL patients. 4. Evaluate clinical outcomes, including hematologic response, relapse, and mortality 5. Investigate long-term prognosis, including post-discontinuation outcomes and health-related quality of life.
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Hematologic response
Timeframe: Assessments will be conducted at baseline, 6 months, 12 months, and 24 months after treatment, as well as at study completion, with an average interval of approximately 1 year.