PDCD1 and peripheral T-cell lymphoma, not otherwise specified: In angioimmunoblastic lymphoma, PD-1 shows a bright expression and can help in differential diagnosis with other peripheral T-cell lymphomas, as well as inclusion of CD10 in multi-parametric flow cytometry panels allowing differential diagnosis of angioimmunoblastic lymphoma because of its lack, and CD200 inclusion for ruling out a diagnosis of nodal T-follicular helper cell lymphoma [13,14].