Chidamide in Patients With Relapsed or Refractory Peripheral T-cell Lymphoma (R/R PTCL)

This is a phase II, open-label, non-randomized, single-arm, multicenter study to evaluate the efficacy, safety, and PK of chidamide in patients with R/R PTCL. To determine eligibility, subjects must have PTCL confirmed with a sample or specimen evaluated by the investigator.A treatment cycle is defined as 4 weeks. All eligible subjects will be treated with chidamide until disease progression, intolerable toxicity effects, death, or withdrawal of consent.