title: Morphological and immunological changes of hairy cell leukemia during alpha-2-interferon therapy.
abstract: We describe a patient who presented with the clinical picture of hairy cell leukemia (HCL). Bone marrow and peripheral blood lymphoma cells showed morphological and immunological features of HCL. Under recombinant alpha-2-interferon (alpha-2-IF) therapy the characteristic morphology changed from HCL to prolymphocytic leukemia (PLL). At diagnosis the lymphoma cells expressed CD24 and FMC7 surface antigen, but stained negative for surface immunoglobulins, light chains and anti-CD5. During alpha-2-IF treatment surface antigen expression changed to CD24, CD5 and FMC7. Surface IgD and lambda light chains became strongly positive. Southern Blot analysis of peripheral blood mononuclear cells showed two rearranged immunoglobulin bands at diagnosis but only one upon alpha-2-IF therapy. These data suggest, that this patient suffered from a biclonal lymphoma, HCL and PLL. While undergoing alpha-2-IF treatment the HCL came into remission, whereas the PLL clone proved to be poorly sensitive to alpha-2-IF therapy.
authors.affiliation: First Department of Internal Medicine, AKH-Linz, Austria.
authors.forename: M A
authors.initials: MA
authors.lastname: Fridrik
authors.forename: G
authors.initials: G
authors.lastname: Wahl
authors.forename: W
authors.initials: W
authors.lastname: Herbinger
authors.forename: W
authors.initials: W
authors.lastname: Schützenberger
authors.forename: G
authors.initials: G
authors.lastname: Gastl
authors.forename: C
authors.initials: C
authors.lastname: Huber
authors.forename: M
authors.initials: M
authors.lastname: Krönke
authors.forename: I
authors.initials: I
authors.lastname: Höpfel
mesh_terms: D000368:Aged; D000954:Antigens, Surface / Q000276:immunology; D015139:Blotting, Southern; D005260:Female; D006801:Humans; D007370:Interferon Type I / Q000627:therapeutic use*; D007943:Leukemia, Hairy Cell / Q000276:immunology* / Q000628:therapy; D015463:Leukemia, Prolymphocytic / Q000276:immunology; D007963:Leukocytes, Mononuclear / Q000276:immunology; D011994:Recombinant Proteins
chemical_list: D000954:Antigens, Surface; D007370:Interferon Type I; D011994:Recombinant Proteins