The neoplastic cells of which MALT lymphomas are composed express B-cell antigens and show monotypic immunoglobulin expression with light-chain restriction. Although neoplastic MALT lymphoma cells do not express CD5, previous studies have shown that CD5 positive MALT lymphomas are more prone to ...
Immunophenotyping by flow cytometry revealed a discrete lymphoid population (bright CD45 and low side scatter) that expressed CD19, CD20, CD22, FMC-7 (45%), and monotypic lambda light chain but was negative for CD5, CD10, CD23, and CD34 (Figure 3; some data are not shown). The immun...