A Study to Assess Frequency of Undetectable Minimal Residual Disease (uMRD) in Adult Participants With Chronic Lymphocytic Leukemia (CLL) Receiving Oral Venetoclax Tablets ± Intravenously (IV) Infused Rituximab in Routine Clinical Practice in Japan

Most cases of Chronic lymphocytic leukemia (CLL) remain an incurable disease with the goal of therapy being to improve quality of life and to prolong survival. This study will evaluate the participant's related outcomes and experience of CLL in adult participants who are treated in the Japan. Study participants will receive oral treatments of Venetoclax±Rituximab for CLL as prescribed by their study doctor in accordance with approved local label. Adult participants prescribed various treatments Venetoclax±Rituximab will be enrolled. Around 89 participants will be enrolled in the study in sites in Japan. Participants will receive oral venetoclax tablets ± intravenously (IV) infused rituximab treatments for CLL according to the approved local label. The overall study duration will be 27 months. There is expected to be no additional burden for participants in this trial. All study visits will occur during routine clinical practice.