[Detection of API2-MALT1 fusion gene in extranodal B-cell lymphoma and its significance]..     ///    The expression of API2-MALT1 mRNA was studied in all cases by reverse transcriptase (RT)-polymerase chain reaction (PCR) and nested PCR.     ///    API2-MALT1 transcripts were detected in 39 of the 94 lymphoma cases (with 28 cases being MALT lymphoma and 11 cases being extranodal DLBCL).     ///    "The expression of API2-MALT1 mRNA can be detected in both MALT lymphoma and extranodal DLBCL, but not in Hashimoto's thyroiditis. "    ///    " To study the expression of API2-MALT1 mRNA in mucosa-associated lymphoid tissue (MALT) lymphoma, extranodal diffuse large B-cell lymphoma (DLBCL) and Hashimoto's thyroiditis, to investigate the expression pattern of API2-MALT1 variants, and to correlate the findings with the clinicopathologic features and prognosis. "