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Chronic Lymphocytic Leukemia

Part of Leukemia

6 published articles · Updated continuously

Clinical Trial Landscape

Clinical Trials for Chronic Lymphocytic Leukemia

139 trials tracked for Chronic Lymphocytic Leukemia: 25 in phase 3 or 4 and 15 with published results. The most-cited published study has 551 citations.

139Trials tracked
25Phase 3 & 4
0Recruiting
15With published results
Phase distribution
Phase 4 1 Phase 3 24 Phase 2 101 Phase 1 9 Other / NA 4
  1. Phase 3 A Multi-Center Study of Ibrutinib in Combination With Obinutuzumab Versus Chlorambucil in Combination With Obinutuzumab in Patients With Treatment naïve Chronic Lymphocytic Leukemia (CLL) or Small Lymphocytic Lymphoma (SLL) Completed · 551 cited
  2. Phase 3 A Study of Ibrutinib in Combination With Bendamustine and Rituximab in Patients With Relapsed or Refractory Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma Completed · 411 cited
  3. Phase 3 A Phase 3 Study of Duvelisib Versus Ofatumumab in Patients With Relapsed or Refractory CLL/SLL (DUO) Completed · 341 cited
  4. Phase 3 A Study to Evaluate the Benefit of Venetoclax Plus Rituximab Compared With Bendamustine Plus Rituximab in Participants With Relapsed or Refractory Chronic Lymphocytic Leukemia (CLL) Completed · 304 cited
  5. Phase 3 Open-label Phase 3 BTK Inhibitor Ibrutinib vs Chlorambucil Patients 65 Years or Older With Treatment-naive CLL or SLL Completed · 273 cited
  6. Phase 3 Open-label Extension Study in Patients 65 Years or Older With Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma Completed · 272 cited
Show 44 more trials
  1. Phase 3 Study Evaluating the Efficacy and Safety of Idelalisib in Combination With Bendamustine and Rituximab for Previously Treated Chronic Lymphocytic Leukemia (CLL) (Tugela ) Completed · 247 cited
  2. Phase 3 Comparison of the Treatments of Obinutuzumab + Venetoclax Versus Obinutuzumab + Chlorambucil in Patients With Chronic Lymphocytic Leukemia Completed · 134 cited
  3. Phase 3 Graft-Versus-Host Disease Prophylaxis in Treating Patients With Hematologic Malignancies Undergoing Unrelated Donor Peripheral Blood Stem Cell Transplant Completed · 112 cited
  4. Phase 3 A Study of Different Doses of Ibrutinib in Participants With Chronic Lymphocytic Leukemia (CLL) Completed · 101 cited
  5. Phase 3 A Study of Zanubrutinib (BGB-3111) Versus Ibrutinib in Participants With Relapsed/Refractory Chronic Lymphocytic Leukemia Completed · 83 cited
  6. Phase 3 Ublituximab in Combination With Ibrutinib Versus Ibrutinib Alone in Participants With Previously Treated High-Risk Chronic Lymphocytic Leukemia (CLL) Completed · 50 cited
  7. Phase 3 A Study to Evaluate the Efficacy of Venetoclax Monotherapy in Relapsed/Refractory Participants With Chronic Lymphocytic Leukemia (CLL) Completed · 43 cited
  8. Phase 3 A Safety and Efficacy Study of Obinutuzumab Alone or in Combination With Chemotherapy in Participants With Chronic Lymphocytic Leukemia Completed · 35 cited
  9. Phase 3 Tac, Mini-MTX, MMF Versus Tac, MTX for GVHD Prevention Completed · 11 cited
  10. Phase 4 A Study of MabThera Added to Bendamustine or Chlorambucil in Patients With Chronic Lymphocytic Leukemia (MaBLe) Completed
  11. Phase 3 A Study of PCI-32765 (Ibrutinib) Versus Rituximab in Relapsed or Refractory Chronic Leukemia/Lymphoma Completed
  12. Phase 3 A Study to Assess the Effect of Maintenance Treatment With Rituximab Versus No Treatment in Participants With Progressive B-Cell Chronic Lymphocytic Leukemia (CLL) Completed
  13. Phase 3 A Phase 3 Extension Study of Duvelisib and Ofatumumab in Participants With CLL/SLL Previously Enrolled in Study IPI-145-07 Completed
  14. Phase 3 CLL11: A Study of Obinutuzumab (RO5072759 [GA101]) With Chlorambucil in Patients With Previously Untreated Chronic Lymphocytic Leukemia (Stage 1a) Completed
  15. Phase 3 CLL11: A Study of Rituximab With Chlorambucil or Chlorambucil Alone in Patients With Previously Untreated Chronic Lymphocytic Leukemia (Stage 1b) Completed
  16. Phase 3 Bendamustine Hydrochloride (HCl) in Indolent Non-Hodgkin's Lymphoma That Has Progressed During or Following Treatment With a Rituximab Regimen or Previously Untreated Chronic Lymphocytic Leukemia Completed
  17. Phase 3 A Randomized, Double-Blind, Placebo-Controlled Study of Idelalisib in Combination With Rituximab for Previously Treated Chronic Lymphocytic Leukemia (CLL) Completed
  18. Phase 3 CLL11: A Study of Obinutuzumab (RO5072759 [GA101]) With Chlorambucil in Patients With Previously Untreated Chronic Lymphocytic Leukemia (Stage 2) Completed
  19. Phase 3 FCR Versus FC Alone in the Treatment of Chronic Lymphocytic Leukemia (CLL) in Relapsed Patients Completed
  20. Phase 2 Fludarabine Phosphate, Radiation Therapy, and Rituximab in Treating Patients Who Are Undergoing Donor Stem Cell Transplant Followed by Rituximab for High-Risk Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma Completed
  21. Phase 2 Fludarabine, Rituximab, and Lenalidomide in Minimally Treated/Untreated Patients With Chronic Lymphocytic Leukemia (CLL) Completed
  22. Phase 2 Fludarabine Phosphate and Total-Body Irradiation Before Donor Peripheral Blood Stem Cell Transplant in Treating Patients With Chronic Lymphocytic Leukemia or Small Lymphocytic Leukemia Completed
  23. Phase 2 CHAIROS Study A Study of MabThera/Rituxan (Rituximab) Maintenance Therapy in Patients With B-Cell Chronic Lymphocytic Leukemia (CLL) Naive to Chemotherapy Completed
  24. Phase 2 Lenalidomide in Chronic Lymphocytic Leukemia (CLL) Patients With Residual Disease Completed
  25. Phase 2 Safety and Tolerability of HSC835 in Patients With Hematological Malignancies Completed
  26. Phase 2 Protocol for the Treatment of Patients With Previously Untreated Chronic Lymphocytic Leukemia Completed
  27. Phase 2 Phase II Trial of Revlimid® and Rituximab for Relapsed or Refractory Chronic Lymphocytic Leukemia (CLL) Completed
  28. Phase 2 Myeloablative Umbilical Cord Blood Transplantation in Hematological Diseases Completed
  29. Phase 2 Ofatumumab, Pentostatin, and Cyclophosphamide in Treating Patients With Untreated Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma Completed
  30. Phase 2 Ofatumumab, High Dose Methylprednisolone, Ofatumumab and Lenalidomide Consolidative Therapy for Untreated CLL/SLL Completed
  31. Phase 2 Study Evaluating AMD3100 for Transplantation of Sibling Donor Stem Cells in Patients With Hematological Malignancies Completed
  32. Phase 2 Study to Evaluate the Safety and Efficacy of the Combination of Tirabrutinib and Idelalisib With and Without Obinutuzumab in Adults With Relapsed or Refractory Chronic Lymphocytic Leukemia (CLL) Completed
  33. Phase 2 A Study of MabThera (Rituximab) Plus Chlorambucil in Participants With Chronic Lymphocytic Leukemia. Completed
  34. Phase 2 Letermovir for the Prevention of Cytomegalovirus Reactivation in Patients With Hematological Malignancies Treated With Alemtuzumab Completed
  35. Phase 2 CFAR Study in Patients With Chronic Lymphocytic Leukemia Completed
  36. Phase 2 Study of BGB-10188 as Monotherapy, and in Combination With Zanubrutinib, and Tislelizumab Completed
  37. Phase 2 Safety and Tolerability of HSC835 in Patients With Hematological Malignancies Undergoing Single Umbilical Cord Blood Transplant Completed
  38. Phase 2 Penostatin, Rituximab and Ontak and Allogeneic Natural Killer (NK) Cells for Refractory Lymphoid Malignancies Completed
  39. Phase 2 A Study of Idelalisib (GS1101, CAL101) + Ofatumumab in Previously Untreated CLL/SLL Completed
  40. Phase 2 Sirolimus, Cyclosporine, and Mycophenolate Mofetil in Preventing Graft-versus-Host Disease in Treating Patients With Blood Cancer Undergoing Donor Peripheral Blood Stem Cell Transplant Completed
  41. Phase 2 Reduced Intensity Conditioning Transplant Using Haploidentical Donors Completed
  42. Phase 2 A Study of Rituximab (MabThera) in Participants With Chronic Lymphocytic Leukemia (CLL) Completed
  43. Phase 2 Methods to Enhance the Safety and Effectiveness of Stem Cell Transplants Completed
  44. Phase 2 Safety Study of CAT-8015 to Treat Advanced B-cell Non-Hodgkin Lymphoma and Chronic Lymphocytic Leukemia (NHL or CLL) Completed

Showing the 50 most-cited and recently-updated of 139 trials. Browse the full registry →

Trial data sourced from ClinicalTrials.gov. Counts describe the research landscape and are not a treatment recommendation. Informational only — not medical advice.

What the trials found Updated — new results For clinicians

Chronic Lymphocytic Leukemia: what the trials found

Multiple studies evaluated the efficacy of various targeted and conventional therapies for Chronic Lymphocytic Leukemia. Ibrutinib demonstrated significant improvements in progression-free survival (PFS) across several trials, including a median PFS of 65.12 months compared to 14.32 months 9, and 106.9 months compared to 15.0 months in another cohort 7. Ibrutinib also showed superior overall response rates (ORR) 8 and significant outcomes in high-risk subpopulations, including those with del17p/TP53 mutation or Del 11q 4.

Other targeted agents showed clinical activity: Zanubrutinib demonstrated an ORR of 83.5% to 86.2% 14, while Idelalisib achieved an ORR of 70.0% and a lymph node response rate of 96.9% 10. Ublituximab showed an ORR of 84.4% and a significantly higher MRD-negativity rate compared to the control 15. Venetoclax demonstrated a complete remission rate of 35.1% in patients not previously treated with BCRi therapy 16.

Conventional therapies like bendamustine were evaluated across multiple trials; one study showed a significant difference in the percentage of participants achieving confirmed complete response (CR) in both first-line and second-line subpopulations 3, while another trial reported significantly improved progression-free survival compared to standard treatment 6. Chlorambucil was also studied, showing an OR of 71.3% and a CRR of 23.1% 11. Cladribine showed a median PFS of 2.1 to 3.1 months in its respective study 20, while Rituximab demonstrated a significant progression-free survival benefit 21.

Recent results — preliminary, needs further review

  • BGB-10188 is currently being evaluated in a Phase 2 trial 1.
  • Cholecalciferol is undergoing evaluation in a Phase N/A trial 2.

For the clinician treating this condition

  • Ibrutinib provides significant and sustained progression-free survival (PFS) across multiple patient populations, including high-risk subgroups [4, 7, 8, 9].
  • Zanubrutinib and Ulituximab demonstrate high overall response rates (ORR) and favorable remission profiles in clinical trials [14, 15].
  • Bendamustine shows significant efficacy in achieving complete responses across different treatment lines compared to standard therapies [3, 6].

AI synthesis of 15 cited trials, updated Jun 21, 2026. Informational only — not medical advice; trial data sourced from ClinicalTrials.gov. How we use AI.

HCP Mode — summaries include clinical detail, trial data, and statistical outcomes.
Patient Mode — summaries use plain language, avoiding clinical jargon.

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