Participants with stage IV-V chronic kidney disease or end stage renal disease Participants with stage V chronic kidney disease or end stage renal disease History of end-stage renal disease requiring dialysis Subjects with end-stage kidney disease and/or grade II liver dysfunction End-stage renal disease (i.e., any patient requiring or advised to undergo dialysis) Has hepatic dysfunction defined as Model for End-Stage Liver Disease (MELD) Score >12. End-stage liver disease unrelated to tumor End-stage renal disease: requiring hemodialysis Patients with acute hepatitis or end stage liver disease Subject has end stage renal disease and requires chronic dialysis Patients with end-stage disease, severe dementia and/or life expectancy of less than one year Patients with end-stage renal disease defined as creatinine clearance of < 15mL/min and/or diagnosed with stage 5 chronic kidney disease End stage renal disease (ESRD) Participants with end-stage liver disease (cirrhosis) Patients with end-stage disease, severe dementia and/or life expectancy of less than one year Have end stage renal disease Patients with end stage renal disease (ESRD) and/or on dialysis Have end-stage renal disease End Stage Renal Disease (ESRD) Model for end-stage liver disease (MELD) > 20 End stage renal disease with hemodialysis Has end-stage renal impairment End-stage liver disease unrelated to tumor End-stage renal disease (ESRD) on hemodialysis or CrCl ? 75 mL/min Current diagnosis of cancer, unstable cardiovascular disease, end-stage liver or kidney disease, or other major medical illness Patients must not have any other serious concurrent disease or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that would put the patient at undue risk of undergoing therapy Have any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the patient at undue risk to undergo treatment Any other severe concurrent disease, or history of serious organ dysfunction or disease involving the heart, kidney, liver or other organ system that, in the investigator’s opinion, may place the patient at undue risk to undergo therapy with ibrutinib. Have any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the patient at undue risk to undergo treatment Have any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the patient at undue risk to undergo treatment Any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the patient at undue risk to undergo the proposed therapy; this includes uncontrolled hypertension and uncontrolled diabetes, as cases of life threatening hyperglycemia have been reported (using continuous infusion at higher doses of omacetaxine) Have any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the patient at undue risk to undergo treatment Any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver or other organ system that may place the patient at undue risk to undergo therapy with ibrutinib and rituximab Have any other severe concurrent disease, or have a history of serious organ dysfunction (e.g. uncontrolled or severe cardiovascular disease, diabetes, pulmonary disease, infection, psychiatric illness) that may in the judgment of the treating physician/ principal investigator place the patient at undue risk to undergo treatment History of serious organ dysfunction or disease involving the heart, kidney, liver or other organ system that may place the patient at undue risk to undergo treatment Any other severe concurrent disease, or serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the patient at undue risk to undergo the proposed therapy Current life-threatening illness, medical condition, or organ system dysfunction which, in the Investigator’s opinion, could compromise the patient’s safety, or put the study at risk; any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver or other organ system that may place the subject at undue risk to undergo therapy with ibrutinib Have other severe concurrent disease or serious organ dysfunction involving the heart, kidney, liver or other organ system that may place the patient at undue risk to undergo treatment including uncontrolled hypertension, uncontrolled cardiac arrhythmias, symptomatic congestive heart failure, unstable angina, or myocardial infarction within the past 6 months Have other severe concurrent disease or serious organ dysfunction involving the heart, kidney, liver or other organ system that may place the patient at undue risk to undergo treatment Any other severe concurrent disease, or have a history of serious organ dysfunction or disease involving the heart, kidney, liver, or other organ system that may place the participant at undue risk to undergo treatment