title: [Acquired aplastic anemia: a stereological analysis of bone marrow fatty tissue and its clinical correlations].
abstract: BACKGROUND
  To analyze the changes of the number and size of bone marrow adipocytes in aplastic anaemia. To discover possible clinical and haematological factors which may be associated with predominant expansion of the number or size of adipocytes. To analyze the prognostic value of the adipocyte number and size.
  
  
  METHODS
  The adipose tissue of 25 plastic-embedded bone marrow specimens corresponding to patients with aplastic anaemia was studied stereologically. The correlation study between the results obtained and clinical and haematological data was carried out.
  
  
  RESULTS
  The expansion of the adipose tissue is due to the predominant increase of the adipocyte number in some cases and of the adipocyte size in others. Among different clinical and haematological factors, only a lower age is significantly associated with a predominant increase of adipocyte number. In the prognostic stratification performed according to three different systems, neither the adipocyte number nor the size showed a statistically significant association.
  
  
  CONCLUSIONS
  In the aplastic anaemia, the younger patients expand their bone marrow adipose tissue by increasing predominantly the adipocyte number, whereas in the older patients this occurs by predominantly increasing the adipocyte size (may be due to the decrease in proliferative potential). On the other hand, both the adipocyte number and size lack prognostic significance.
authors.affiliation: Escuela de Hematología Farreras Valentí, Hospital Clínic i Provincial, Barcelona.
authors.forename: C
authors.initials: C
authors.lastname: Rozman
authors.forename: E
authors.initials: E
authors.lastname: Feliu
authors.forename: M
authors.initials: M
authors.lastname: Rozman
authors.forename: J C
authors.initials: JC
authors.lastname: Reverter
authors.forename: C
authors.initials: C
authors.lastname: Climent
authors.forename: L
authors.initials: L
authors.lastname: Berga
mesh_terms: D017667:Adipocytes / Q000473:pathology*; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000741:Anemia, Aplastic / Q000453:epidemiology / Q000473:pathology*; D001707:Biopsy, Needle; D001853:Bone Marrow / Q000473:pathology*; D002648:Child; D005260:Female; D006801:Humans; D016018:Least-Squares Analysis; D008297:Male; D008875:Middle Aged; D011379:Prognosis
vernacular_title: Aplasia medular adquirida: análisis estereológico del tejido adiposo de la medula ósea y sus correlaciones clínicas.