 To investigate the frequency of different variant of API2-MALT1 fusion gene in extranodal marginal zone B-cell lymphoma of mucosa-associated tissue(MALT1) lymphoma and the correlation between API2-MALT1 transcript and apoptosis of MALT lymphoma.     ///    [The frequency of API2-MALT1 fusion gene variants in MALT lymphoma and its correlation with apoptosis of MALT lymphoma]..     ///    The API2-MALT1 fusion transcripts were detected in 62 cases of MALT lymphoma by reverse transcription-polymeras chain reaction(RT-PCR) and Nested PCR.     ///    The frequency of API2-MALT1 transcript was lower in thyroid MALT lymphoma(1/12) but similar in pulmonary and gastrointestinal MALT lymphoma.     ///    API2-MALT1 transcript was detected in 28 of 62 cases with MALT lymphoma (45.16%).     ///    API2-MALT1 transcript displayed variable frequency in MALT lymphomas of different sites.     ///    API2-MALT1 transcript was confirmed to be associated with the levels of apoptosis and API2 of MALT lymphoma..     ///    Two kinds of API2-MALT1 variants (A1446-M1123 and A1446-M814) were detected.     ///    A1446-M1123 was noted to be probably the main type of API2-MALT1 variant in MALT lymphoma of Chinese.     ///    "In the group of API2-MALT1(+), the apoptosis index was higher and the API2 mRNA and protein were lower when compared against those in the group of API2MALT1(-). "