MALT lymphomas are B-cell derived with CD20 expression and frequently contain numerous admixed CD3+-reactive T cells.18,19 Unlike chronic lymphocytic leukemia/small lymphocytic lymphoma and mantle cell lymphoma, the lymphomas of MALT origin usually lack CD5 and are without bcl-2 gene rearrangements.20 MALT lymphomas differ from follicular lymphomas in that they are negative for CD10 and do not exhibit bcl-2 rearrangements.20 The immunophenotypic results of the current biopsy samples along with the characteristic histologic features led to the confirmation of MALT lymphoma. This evidence concerns the gene MME and mantle cell lymphoma.