Abstract:
BACKGROUND:The histopathologic features characterizing the involvement of the bone marrow (BM) in systemic lupus erythematosus (SLE) have not been systematically analyzed to date. OBJECTIVES:The aim of this study was to assess morphologic and immunohistochemical characteristics of BM involvement in SLE. PATIENTS AND METHODS:Clinical and serological data of 40 SLE patients with unexplained cytopenias were studied. Ten patients with myelodysplasia of refractory anemia (RA) were used as controls. BM aspiration, BM biopsy (BMB), and immunohistochemistry were carried out in patients and controls. BM fibrosis, BM necrosis, stromal edema, and abnormal localization of immature precursors (ALIP) were assessed according to standard criteria. RESULTS:Dyserythropoiesis and megakaryocytic atypias were uniform findings in SLE patients. The disruption of the normal BM architecture was a predominant SLE BM feature affecting cells of all three hemopoietic lineages, with both erythroid and megakaryocytic precursors tending to assume paratrabecular locations and ALIP aggregates being present in 27 cases. In addition, BM was hypocellular in 23 cases. BM necrotic alterations were evident in 90% of the cases. The density of reticulin content was generally increased. Vascular changes including dilatation of sinuses were manifest and were associated with the presence of necrotic alterations (P = 0.008). Hemoglobin levels correlated inversely with the presence of ALIP (P = 0.016). Upon comparing BMB features between SLE and RA controls there were striking similarities. CONCLUSIONS:BMB in patients with SLE and unexplained cytopenias presents a variety of histopathologic findings including BM necrosis, stromal alterations, hypocellularity, dyspoiesis, and distortion of normal BM architecture, characterized primarily by the presence of ALIP aggregates.
journal_name
Am J Hematoljournal_title
American journal of hematologyauthors
Voulgarelis M,Giannouli S,Tasidou A,Anagnostou D,Ziakas PD,Tzioufas AGdoi
10.1002/ajh.20593subject
Has Abstractpub_date
2006-08-01 00:00:00pages
590-7issue
8eissn
0361-8609issn
1096-8652journal_volume
81pub_type
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