Study of Acalabrutinib and Tafasitamab in MZL Patients

This is a multicenter open label phase II trial in patients with previously treated Marginal Zone Lymphomas. The aim of the study is to evaluate the efficacy and the safety of tafasitamab in combination with acalabrutinib. Twenty-four patients are expected to be enrolled and treated every 28 days with acalabrutinib and tafasitamab for 24 cycles. The study consists of two parts, which are performed sequentially. The first part is a safety run-in to evaluate the safety data once 6 patients (representing the 25% of the total cohort) have completed the first cycle of treatment. An Independent Data Monitoring Committee (IDMC) will provide an independent assessment of this evaluation. The second part starts after the outcome of this evaluation and will include the remaining 18 patients. The 6 patients of the safety run-in phase will be considered for the final evaluation of the study. Between 11 - 13 weeks, patients showing partial or complete response (PR, CR) will continue treatment, while patients showing stable disease (SD) will discontinue it. However, patients in SD who benefit from therapy may continue to be treated, after agreement between the Investigator and the Sponsor. Patients who complete the 24 cycles of treatment will enter the follow-up phase up to 3 years from patient\'s last study treatment dose (about 5 years from treatment start). Patients who discontinue treatment before cycle 24 for any reason will be followed for up to 3 years (every 6 months for the first year and yearly for the second and third year) from the patient\'s last study treatment dose. .