GCSAM and marginal zone lymphoma: By using only CD10, one could run a potential risk to misdiagnosing FL as nodal marginal zone lymphoma (MZL): in their series of originally diagnosed nodal MZLs based on CD10 negativity, Salama et al. correctly reclassified 3% of them as FL by applying other GC markers, including BCL6 and HGAL [26].