A Study of Hematopoiesis in Patients with Monoclonal B Cell Lymphocytosis (MBL), B-Chronic Lymphocytic Leukemia (CLL), and Healthy Controls


  • Study type

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • Site IRB
    • Rochester, Minnesota: 16-006204
    Sponsor Protocol Number: 16-006204

About this study

The purpose of this study is to determine the cellular and mechanistic basis of bone marrow hematopoietic dysfunction in untreated Monoclonal B Cell Lymphocytosis (MBL) and B-Chronic Lymphocytic Leukemia (CLL) patients.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria:

  • Subjects in the CLL cohort who are eligible for these studies will have a clinically established diagnosis of CLL as assessed by flow cytometry and will include subjects who a) remain untreated, b) are currently being treated, or c) who have already been treated. 
  • Subjects in the MBL cohort will have a clinically established diagnosis of MBL.

Exclusion Criteria: 

  • Anyone under 40

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Neil Kay, M.D.

Open for enrollment

Contact information:

Matthew Holets




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