title: Myeloblastoma formation in acute myeloid leukemia.
abstract: The cell surface markers on the leukemic cells of 76 patients with adult acute myeloid leukemia (AML) have been analyzed by indirect immunofluorescence, and the presence of CD56+ leukemic cells was detected in ten of these patients. Four of these 10 CD56+ AML patients developed extramedullary myeloblastomas and in two of them an intracranial myeloblastoma. In contrast, in the remaining 66 CD56- AML patients, only one patient developed a myeloblastoma formation of the subcutaneous. It may be that the CD56 antigen which is an isoform of the neural cell adhesion molecule (NCAM), expressed on neurons, satellite cells of skeletal muscle cells, and on stromal cells, binds these tissues by a homophilic mechanism. CD56+ leukemic cells are capable of invading and of surviving in extramedullary tissues, where they proliferate and develop into a myeloblastoma. Because of this possibility, CD56+ AML patients should be carefully monitored for signs of myeloblastoma formation.
authors.affiliation: First Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Iizuka
authors.forename: M
authors.initials: M
authors.lastname: Aiso
authors.forename: K
authors.initials: K
authors.lastname: Oshimi
authors.forename: M
authors.initials: M
authors.lastname: Kanemaru
authors.forename: M
authors.initials: M
authors.lastname: Kawamura
authors.forename: J
authors.initials: J
authors.lastname: Takeuchi
authors.forename: A
authors.initials: A
authors.lastname: Horikoshi
authors.forename: T
authors.initials: T
authors.lastname: Ohshima
authors.forename: H
authors.initials: H
authors.lastname: Mizoguchi
authors.forename: T
authors.initials: T
authors.lastname: Horie
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015703:Antigens, CD / Q000032:analysis; D015214:Antigens, Differentiation, Myelomonocytic / Q000032:analysis; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D000951:Antigens, Neoplasm / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis; D001932:Brain Neoplasms / Q000276:immunology / Q000473:pathology*; D018801:CD2 Antigens; D019002:CD56 Antigen; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000276:immunology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011971:Receptors, Immunologic / Q000032:analysis; D063268:Sialic Acid Binding Ig-like Lectin 3
chemical_list: D015703:Antigens, CD; D015214:Antigens, Differentiation, Myelomonocytic; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D018801:CD2 Antigens; C571163:CD33 protein, human; D019002:CD56 Antigen; D011971:Receptors, Immunologic; D063268:Sialic Acid Binding Ig-like Lectin 3