title: Hematologic and cytofluorographic analysis of patients with Felty's syndrome. A hypothesis that a discrete event leads to large granular lymphocyte expansions in this condition.
abstract: OBJECTIVE
  To compare hematologic and cytofluorographic features in Felty's syndrome (FS) patients with and without the large granular lymphocyte (LGL) syndrome.
  
  
  METHODS
  Peripheral blood cells from FS patients and from 2 control groups (rheumatoid arthritis [RA] patients and subjects without symptoms of a rheumatic disease) were analyzed by hematologic and cytofluorographic techniques. A separate assessment of disease activity was performed.
  
  
  RESULTS
  FS patients had reduced lymphocyte and platelet counts, with a parallel reduction in lymphocyte subsets examined. CD4 counts were reduced in all FS patients, including those with the LGL syndrome. Disease activity was lower in FS patients than in RA control patients. Treatment was similar in all patient groups. No direct association was seen between LGL numbers and duration of RA or neutrophil counts in RA groups.
  
  
  CONCLUSIONS
  Hematologic abnormalities in FS extend beyond neutropenia. Although similarities were seen between FS patients and FS patients with the LGL syndrome (e.g., CD4 lymphopenia), evidence for a gradation from FS to the LGL syndrome was not seen, thus favoring the hypothesis that a "transforming event" is required.
authors.affiliation: UMDS, Guy's Hospital, London, UK.
authors.forename: S J
authors.initials: SJ
authors.lastname: Bowman
authors.forename: V
authors.initials: V
authors.lastname: Corrigall
authors.forename: G S
authors.initials: GS
authors.lastname: Panayi
authors.forename: J S
authors.initials: JS
authors.lastname: Lanchbury
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001772:Blood Cell Count; D017252:CD3 Complex / Q000032:analysis; D018959:CD57 Antigens / Q000032:analysis; D002469:Cell Separation; D005258:Felty Syndrome / Q000097:blood* / Q000188:drug therapy / Q000473:pathology*; D005260:Female; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D006801:Humans; D008214:Lymphocytes / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009503:Neutropenia / Q000473:pathology; D010641:Phenotype
chemical_list: D017252:CD3 Complex; D018959:CD57 Antigens