Ibrutinib, Bortezomib and Rituximab-CHOP for the Treatment of Elderly Patients With CD20+ DLBCL, IPI ≥ 2

Cycle 1 (C1): At C1/day d2, there will be a CT- or ultrasound-guided re-biopsy of a lymphoma lesion that is accessible for biopsy without considerable risk for the patient. Cycle 2 (C2): After C2, a post-Interim CT will be performed (eventually FDG and FLT PET-CT imaging added to the protocol by amendment). Cycle 3 (C3): At C3/d0 (prior to therapy), there will also be another bone marrow aspirate for MRD follow-up. At C3/d2, there will be a re-biopsy of a lymphoma site in case of a residual lesion by CT that is accessible for biopsy without considerable risk for the patient. Biopsies can be obtained CT- or ultrasound-guided. End of treatment/post-therapy: The end-of-treatment visit is required for all subjects, irrespective of a completion of all 8 cycles of therapy or exit of the study protocol. It has to be scheduled approximately 4 to 6 weeks after the last cycle. A total of 7 Follow up visits is planned over 30 months of follow up.