PTPN6 and mature T-cell and NK-cell non-Hodgkin lymphoma: Correlative analysis in pSTAT3-positive PTCL patients grouped by differential PTPN6 expression showed worse OS in PTPN6 low/pSTAT3+ (n = 37) compared to the PTPN6-High/pSTAT3+ (n = 33) group (HR = 1.3, p = 0.37; Fig. 5b).