Purpose　To study the clinicopathologic and immunohistochemical characteristics of mantle cell lymphomas(MCL). Methods　Six cases of MCL in lymph nodes were collected and immunohistochemical stains for CD45,CD20,CD79,CD45RO,CD30,CD68,CD43,CD5,cyclinD1,bcl-2,c-myc,IgD and IgM performed. Results　According to the histological pattern, MCL could be divided into 4 subtypes, mantle zone type(1 case), nodular type (1 case), diffuse type (2 cases) and blastoid type (2 cases). The tumor cells were pan-B+, IgD+, CD43+, cyclinD1 + (5/6),CD5+(4/6). Conclusions　MCL is a kind of special immunophenotypic B cell lymphoma. The different histiological subtype may have a different prognosis. The differential diagnosis includes the others B cell lymphomas, for instance, marginal zone B cell lymphomas (MZL),follicular lymphomas(FL), and choronic lymphocytic leukemia/small lymphocytic lymphomas (CLL/SLL).

Purpose　To study the pathological characteristics, diagnostic criteria and differential diagnoses of the lymph node marginal zone B-cell lymphoma (LMZL), for the clinical treatment and prognosis. Methods　Histopathology and immunohistochemistry(ABC method) were used in ten cases of LMZL. Results　There were six male and four female. Lymphadenopathy was the main symptom in all of the cases, of which none had hepatosplenomegaly and abnormal lymphocytes in the peripheral blood. Two of them were marginal zone type, four nodular type, two diffuse type and two blastic type morphologically. Five of them were central cell like (CCL) type, six monocytic B-cell (MBC), two of them lymphoplasmacytic and two blastic histopathologically. Immunophenotyping was done in ten cases and supported the diagnosis. Conclusions　LMZL and MALT-type lymphoma have similar appearance, immunophenotype and cell origin. Based on the structural features, LMZL is a special entity.