(A) Expanded pale looking marginal zone (arrows) surrounding a lymphoid follicle (LF), H&E ×100. (B) Marginal zone cells with round to slightly irregular nuclei and moderate amount of pale cytoplasm, H&E ×400. (C) to (F) Immunohistochemistry showing a CD20+, CD10-, CD23- and CD5-neoplastic lymphoid cells. DAB chromogen ×400.