title: Unexpected absence of a myeloid surface antigen (3-fucosyl-N-acetyllactosamine) in promyelocytic leukemia.
abstract: According to the criteria of the FAB classification we diagnosed acute promyelocytic leukemia in 19 out of 191 AML blast cell populations. The reaction pattern with the anti-myeloid monoclonal antibodies VIM2, MCS2 and MY9 and the MHC-class II antibody VID1 in all cases showed the characteristics which were expected from the normal granulopoiesis. The monoclonal antibody VIM-D5, which recognizes the myeloid cell surface structure 3-fucosyl-N-acetyllactosamine (3-FAL), was not reactive with the majority of promyelocytic blast cells, however. In 13 cases 3-FAL was not detectable and in 6 cases only low or moderate reactivity of VIM-D5 with blast cells was observed. The phenotype of leukemic promyelocytes thus differs from the majority of normal promyelocytes in this respect.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000951:Antigens, Neoplasm / Q000032:analysis*; D000954:Antigens, Surface / Q000032:analysis*; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000276:immunology* / Q000473:pathology; D016256:Lewis X Antigen / Q000032:analysis* / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D016256:Lewis X Antigen