A combination of fludarabine, pixantrone, dexamethasone, and rituximab (FPD-R) achieved major durable responses in patients with relapsed or refractory indolent non-Hodgkin lymphoma (NHL) in a single-arm phase 1 dose-escalation study. The study identified a dose of 120 mg/m2pixantrone as the recommended dose for this regimen. The overall response rate with this regimen was 89%, and the regimen was well tolerated with no grade 3/4 cardiovascular adverse events. Grade 3/4 lymphopenia occurred, however, in 89% of patients and leukopenia in 79%.
The complete study can be read online in Cancer (http://onlinelibrary.wiley.com/doi/10.1002/cncr.26121/abstract).