Patients enrolled to the study will have chronic lymphocytic leukemia (CLL) and are actively receiving ibrutinib. Patients will have either been receiving ibrutinib for one year without having had a complete response or patients will have developed a resistance mutation to ibrutinib. This study will have two parts, a dose escalation part and a dose expansion part. In the dose escalation part, the maximum tolerated dose (MTD) of the combination of VAY736 with ibrutinib will be determined. Once determined, the dose expansion part of the study will begin.
Phase Ib Open-label Study of VAY736 and Ibrutinib in Patients With Chronic Lymphocytic Leukemia (CLL) on Ibrutinib Therapy