Ixazomib Maintenance in Patients With Newly Diagnosed Mantle Cell Lymphoma(MCL)

1. Induction chemotherapy 1) RCHOP(Rituximab+Cyclophosphamide+Doxorubicin+Vincristine+Prednisone) 2) VR-CAP (Bortezomib+Rituximab+Cyclophosphamide+Doxorubicin+Prednisone) Patients who have received induction chemotherapy will be evaluated for responses and those who achieved more than PR(Partial response) or PR will be eligible for this study after receiving informed consents. 2. Experimental step Maintenance ixazomib beginning at least 8 weeks after completion of induction chemotherapy, patients receive ixazomib per oral 3 mg on day 1, 8, and 15 for 4 weeks. And the dose of ixazomib can be escalated to 4mg by response such as partial response or MRD positive. Treatment repeats every 4 weeks for up to 24 months in the absence of disease progression or unacceptable toxicity. Patients are screened and sign the informed consent after completion induction chemotherapy (RCHOP or VR-CAP) with more than PR or PR confirmed. It is likely to take approximately 8 weeks in performing above procedures. Patients start maintenance therapy at least 8 weeks and also can be allowed for the extension of 4 weeks because of delayed response evaluation, recovery toxicities of chemotherapy, and official process including agree with informed consent. Recently, ongoing studies about maintenance therapy in lymphoma have window periods of 8-12 weeks. Ixazomib maintenance should continue for 2 years.