title: A patient with thrombotic microangiopathy accompanied by glomerular subendothelial electron dense deposits.
abstract: A 50-year-old woman presented with thrombocytopenia, microangiopathic hemolytic anemia, and nephrotic syndrome. Although a high level of circulating immune complexes, mild hypocomplementemia, and the antinuclear antibody also were present, the criteria for collagen disease were not fulfilled. Renal biopsy demonstrated a typical thrombotic microangiopathy (TMA) involving glomeruli. There also were electron-dense deposits located just beneath the original glomerular basement membrane in the dilated subendothelial space, thought to be immune complexes following positive IgG, C1q and C3 staining on an immunofluorescent study. Corticosteroid therapy rapidly ameliorated her hematologic abnormalities and proteinuria and normalized the immunologic data. These findings strongly suggest that the TMA in this patient was induced by immune complex-associated mechanisms.
authors.affiliation: University of Shizuoka School of Nursing, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kimura
authors.forename: Y
authors.initials: Y
authors.lastname: Fujigaki
authors.forename: T
authors.initials: T
authors.lastname: Ohtake
authors.forename: R
authors.initials: R
authors.lastname: Furuya
authors.forename: A
authors.initials: A
authors.lastname: Hishida
authors.forename: E
authors.initials: E
authors.lastname: Kaneko
mesh_terms: D001706:Biopsy; D015922:Complement C1q / Q000032:analysis; D003176:Complement C3 / Q000032:analysis; D004730:Endothelium, Vascular / Q000737:chemistry* / Q000473:pathology / Q000648:ultrastructure; D005260:Female; D006463:Hemolytic-Uremic Syndrome / Q000150:complications* / Q000473:pathology; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007668:Kidney / Q000276:immunology / Q000473:pathology; D007674:Kidney Diseases / Q000150:complications / Q000473:pathology; D007678:Kidney Glomerulus / Q000737:chemistry / Q000473:pathology / Q000648:ultrastructure; D008875:Middle Aged; D011697:Purpura, Thrombotic Thrombocytopenic / Q000150:complications* / Q000473:pathology
chemical_list: D003176:Complement C3; D007074:Immunoglobulin G; D015922:Complement C1q