Considering the facts that glycosylation of PD‐L1 by N‐glycosyltransferease can stabilize PD‐L1 protein and that GLT1D1 expression is associated with poor prognosis in NHLs, we investigated whether GLT1D1 could induce immunosuppression through glycosylation and stabilization of PD‐L1 in B‐cell NHLs. Here, GLT1D1 is linked to B-cell non-Hodgkin lymphoma.