...most patients received combination chemotherapy, including cyclophosphamide-doxorubicin-vincristine-prednisone (CHOP) or CHOP-like regimens...increased serum levels of IL-10 at diagnosis is related to the survival and early recurrence of PTCL patients. IL-10 ≥3.6 pg/ml is significantly correlated with lower CR rate, higher recurrence rate and lower OS rate. Furthermore, univariate and multivariate analysis indicated that IL-10 ≥3.6 pg/ml is an independent prognostic factor.