title: Alkaline phosphatase-positive B cell lymphomas.
abstract: Alkaline phosphatase (ALP) activity of 70 cases of non-Hodgkin's lymphomas of the B-cell type was studied. ALP activity was found in malignant lymphoma (ML), follicular, small cleaved cell (1/5 cases); ML, diffuse, small cleaved cell (3/13 cases); and mantle zone lymphoma (intermediate lymphocytic lymphoma) (2/2 cases). The ALP-positive neoplastic cells simultaneously displayed the characteristic immunophenotype of mantle zone (MZ) B lymphocytes of secondary follicle (SIg D+, BA-1+, IL-2R+ and Leu-1+). All other B-cell lymphomas, including ML, follicular, mixed small cleaved and large cell (9 cases); ML, follicular, large cell (4 cases); ML, mixed small and large cell (7 cases); ML, diffuse, large cell (27 cases); and ML, small noncleaved cell (3 cases), were consistently negative for ALP. The present study indicates that ALP-positive lymphomas including follicular lymphomas and diffuse lymphomas may be neoplastic counterparts of ALP-positive MZ B lymphocytes.
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism*; D001402:B-Lymphocytes / Q000201:enzymology*; D015415:Biomarkers / Q000032:analysis; D014408:Biomarkers, Tumor / Q000032:analysis; D006801:Humans; D007150:Immunohistochemistry; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000145:classification / Q000201:enzymology* / Q000473:pathology; D008221:Lymphoid Tissue / Q000033:anatomy & histology / Q000201:enzymology
chemical_list: D015415:Biomarkers; D014408:Biomarkers, Tumor; D000469:Alkaline Phosphatase