A high proportion of tenascin-C expression (>50%) was noted in ALCL, ALK− (81%), AITL (78%), and ALCL, ALK+ (58%), whereas PTCL-NOS (30%) and CTCL (24%) showed lower expression (p = 0.0019). Here, NOS2 is linked to mature T-cell and NK-cell non-Hodgkin lymphoma.