API2-MALT1 rearrangement were found 38.1% in low grade, and 12.5% in transform type.     ///    "A number of factors including pathological characters, grade, stage, prognosis and treatment of 49 cases of MALT lymphoma were analyzed, and the API2-MALT1 rearrangement was detected by RT-PCR. "    ///    " The aim of this study was to investigate the clinical feature of mucosa-associated lymphoid tissue lymphoma and clarify the relationship between the pathological, clinical features, the expression of API2-MALT1 and the prognosis. "