title: Aggressive pleomorphic CD2+, CD3-, CD56+ lymphoma with t(5;9)(q31;q34) abnormality.
abstract: CD56-positive lymphoma is a recently described entity which is characterized by predominantly extranodal involvement and an aggressive clinical course. We report one such case with involvement of the bone marrow and spinal cord at presentation, and associated with reactive hemophagocytic syndrome. The lymphoma cells had a highly pleomorphic appearance which is uncommon in CD56-positive lymphoma. Cytogenetic studies revealed a t(5;9)(q31;q34) abnormality. Analysis of more cases is required to determine if this is a recurring chromosomal translocation characteristic of the group of aggressive CD56-positive lymphoma.
authors.affiliation: Department of Pathology, Queen Elizabeth Hospital, Hong Kong.
authors.forename: K F
authors.initials: KF
authors.lastname: Wong
authors.forename: J K
authors.initials: JK
authors.lastname: Chan
authors.forename: S K
authors.initials: SK
authors.lastname: Ma
authors.forename: K Y
authors.initials: KY
authors.lastname: Lai
mesh_terms: D015703:Antigens, CD / Q000378:metabolism; D000945:Antigens, Differentiation, T-Lymphocyte / Q000378:metabolism; D018801:CD2 Antigens / Q000378:metabolism; D017252:CD3 Complex / Q000378:metabolism; D019002:CD56 Antigen; D002869:Chromosome Aberrations / Q000473:pathology*; D002871:Chromosome Banding; D025063:Chromosome Disorders; D002895:Chromosomes, Human, Pair 5; D002899:Chromosomes, Human, Pair 9; D006801:Humans; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000473:pathology; D008223:Lymphoma / Q000276:immunology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D014178:Translocation, Genetic
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D017252:CD3 Complex; D019002:CD56 Antigen