A Study Comparing Rituximab/Bendamustin(RB) Alternating With Rituximab/Bendamustin/Cytarabin(RBAC) With RB Therapy in Elderly Patients With Mentle Cell Lymphoma

"Patients assigned to the RB alternating with RBAC arm will receive six cycles of alternating RB (odd cycles) or RBAC (even cycles)~RB (1st, 3rd, and 5th cycles)~* Rituximab 375mg/m2, IV, D1~* Bendamustine 90mg/m2, IV, D1-2~RBAC (2nd, 4th, and 6th cycles)~* Rituximab 375mg/m2, IV, D1~* Bendamustine 70mg/m2, IV, D2-3~* Cytarabine 500mg/m2, IV, D2-4"

"Every 4 weeks for 6 cycles~* Rituximab 375mg/m2, IV, D1~* Bendamustine 90mg/m2, IV, D1-2"