Zanubrutinib Plus Rituximab for Patients With Indolent Mantle Cell Lymphoma

This is a phase II, multicentre, randomised open label study to assess the safety and efficacy of zanubrutinib in combination with rituximab for previously untreated indolent MCL patients. 50 patients will be recruited from 15 UK centres over 30 months. Enrolled patients will be randomised (1:1) to ongoing observation (control arm; arm A) or fixed-duration zanubrutinib-rituximab (experimental arm; arm B). Patients will discontinue zanubrutinib-rituximab after 6 cycles of therapy or sooner in the advent of unacceptable toxicity or any other reason. All patients will be followed up for a minimum of 2 years after randomisation. Patients in arm B who develop disease progression and require further therapy after the initial time-limited Zanu-R will receive standard of care therapy according to front line treatment available at that time.