GLT1D1 and neoplasm: For example, Liu et al. found that in B-cell non-Hodgkin’s lymphoma (NHL), glycosyltransferase 1 domain-containing 1 (GLT1D1) is essential for the transfer of N-linked glycans to PD-L1 (Figure 2), which promotes tumor growth by facilitating tumor immunosuppressive function and leads to a poor prognosis [17].