Abstract
Peripheral T-cell lymphoma (PTCL) is a rare, heterogeneous malignancy. Of the 619 patients with relapsed and refractory (R/R) aggressive lymphoma enrolled in the Canadian Cancer Trials Group LY.12 phase 3 trial, 59 (9.5%) had PTCL. Among these, 81% had advanced stage disease, 41% had an International Prognostic Score ≥3, and 41% were refractory to primary therapy. Within the PTCL cohort, the overall response rate after two cycles of salvage chemotherapy was 36%; no difference was observed between dexamethasone, cytarabine, cisplatin (10/30, 33%), and gemcitabine, cisplatin, dexamethasone (11/29, 38%) therapy. At one year, event-free survival (EFS) was 16% and overall survival (OS) was 28%. For PTCL patients, who received autologous stem cell transplant, two-year EFS and OS were 21% and 42%, respectively. Patients with PTCL had inferior OS (HR 0.49, p < .0001) and EFS (HR 0.53, p < .0001) compared to B-cell lymphoma. Outcomes for patients with R/R PTCL are poor with currently available therapies.
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