Efficacy and Safety of CDOP vs CHOP for Newly Diagnosed Peripheral T-cell Lymphoma

This is a open-label, multi-center, randomized, non-inferiority study to compare efficacy and safety of CDOP with standard CHOP regimen in patients with previously untreated PTCL. Study subjects are patients with histologically proven newly diagnosed PTCL. Patients are randomized 1:1 to receive either cyclophosphamide, pegylated liposomal doxorubicin, vincristine and prednisone (CDOP) administered in 3 week cycles for 6 cycles or cyclophosphamide, doxorubicin, vincristine and prednisone (CHOP) administered in 3 week cycles for 6 cycles.This study is divided into three phases: screening phase, treatment phase and follow-up phase. Patients will receive study drug(s) for up to 6 cycles, or until unacceptable toxicity will develop or progression or voluntary withdrawal.Adverse event of every treatment cycle will be recorded.Therapy efficacy will be evaluated after finishing 2 cycles, 4cycles and finishing 6 cycles therapy. Patients will be followed until disease progression, died or 2 years from the last patient randomized.