In PTCL‐NOS, TERT expression was associated with a poor prognosis and a statistical significance (Median overall survival, TERT‐positive 6.2 Months, 95% confidence interval [CI] 0.5–51.1, TERT‐negative 45 months, 95% CI 22.3–209.1; p = 0.0475, Log‐rank test). Here, TERT is linked to mature T-cell and NK-cell non-Hodgkin lymphoma.