retrospective and prospective multicenter observational clinical and biological data collection from all patients with newly diagnosed CLL, SLL or MBL.
retrospective cohort: all cases with a diagnosis between January 1st 2010 and August 31th 2021.
prospective cohort: all patients with a diagnosis between September 1st 2021 and September 1st 2025.
Age ≥18 years at diagnosis
One of the following diagnoses that meet the international diagnostic criteria (iwCLL2018 and WHO2017)
Chronic lymphocytic leukemia (CLL)
Small lymphocytic lymphoma (SLL)
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All patients with CLL/SLL or MBL diagnosis followed at participant sites starting from January 1st, 2010 (retrospective cohort) and from September 1st, 2021 (prospective cohort).
Case-only
Prospective
Not listed
Describe the diagnosis and management of CLL patients
evaluation of CLL management in terms of time to first treatment
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