title: Antineutrophil cytoplasmic antibodies (ANCA) in idiopathic pulmonary hemosiderosis.
abstract: Four children were diagnosed with idiopathic pulmonary hemosiderosis (IPH), over a period of 4 years. Retrospectively, antineurtrophil cytoplasmic antibodies (ANCA) were studied by indirect immunofluorescence (IIF) and ELISA in 18 sera from these patients, stored at -20 degrees C. ANCA-positive sera, from 1/20 to 1/1, 200 dilution, were found in 3/4 of the patients, by IIF. The patient with the highest titre of ANCA died 3 months later during an acute crisis, the other two patients need a minimal dose of steroids. In one case only, a patient who is still without treatment, had no ANCA. The antibodies anti-myeloperoxidase and anti-proteinase-3 were negative or at border line levels. Rheumatoid factor, antinuclear (Hep-2), anti-endomysial, anti-reticulin and antibasement membrane antibodies were negative in all sera. The surviving patients were followed-up for more than 10 years with no systemic or renal disease appearances. The presence of serum ANCA may help to classify children with pulmonary haemorrhage and may have a prognostic value.
authors.affiliation: Department of Pediatrics, Medical School, Hospital Clinico, University of Valladolid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Blanco
authors.forename: P
authors.initials: P
authors.lastname: Solis
authors.forename: S
authors.initials: S
authors.lastname: Gomez
authors.forename: C
authors.initials: C
authors.lastname: Valbuena
authors.forename: J J
authors.initials: JJ
authors.lastname: Telleria
mesh_terms: D019268:Antibodies, Antineutrophil Cytoplasmic; D001323:Autoantibodies / Q000097:blood*; D002648:Child; D002675:Child, Preschool; D015922:Complement C1q / Q000032:analysis; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005455:Fluorescent Antibody Technique; D014890:Granulomatosis with Polyangiitis / Q000150:complications / Q000276:immunology; D006486:Hemosiderosis / Q000209:etiology / Q000276:immunology*; D006801:Humans; D008171:Lung Diseases / Q000209:etiology / Q000276:immunology*; D008297:Male
chemical_list: D019268:Antibodies, Antineutrophil Cytoplasmic; D001323:Autoantibodies; D015922:Complement C1q