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Circulating autoantibodies as serological markers in the differential diagnosis of pulmonary renal syndrome

Abstract. Objectives. Pulmonary renal syndrome (lung haemorrhage and glomerulonephritis) is a fulminant condition that warrants a rapid diagnosis and treatment to prevent mortality and preserve renal functions. However, the patients frequently present with non‐specific pulmonary symptoms in the early phase of the syndrome and the diagnosis is often missed. Recently, several autoantibodies have been described in association with various forms of glomerulonephritis. We evaluated the association as well as the diagnostic and the prognostic significance of these antibodies in pulmonary renal syndrome.