CXCL13 and marginal zone lymphoma: TFH markers were not constantly expressed in MZL cases; PD1: n = 18/20; CXCL13: n = 15/20; BCL6: n = 5/20; no CD10 expression, and average of stained were low; PD1: 19% (± 17.6); CXCL13: 8% (± 8.01); BCL6: 2.5% (± 4.44).