Ibrutinib After Intensive Induction in Treating Patients With Previously Untreated Mantle Cell Lymphoma

PRIMARY OBJECTIVES: I. To determine the progression-free survival (PFS) rate after 3 years. SECONDARY OBJECTIVES: I. Assess toxicity. II. Determine rates of conversion from partial response (PR) to complete response (CR). III. Determine median overall survival (OS) after 4 years. TERTIARY OBJECTIVES: I. Compare minimal residual disease (MRD) results overtime by polymerase chain reaction (PCR) and correlate these with PFS and OS. OUTLINE: Patients receive ibrutinib orally (PO) once daily (QD) on days 1-28. Courses repeat every 28 days for up to 4 years in the absence of disease progression, unacceptable toxicity or patient preference. After completion of study treatment, patients who completed 4 years of treatment are followed up at 30 days. Patients who did not complete 4 years of treatment are followed up for up to 4 years post-first dose of treatment (every 3 months for 2 years and then every 6 months for 4 years).