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CASE REPORTS
JOURNAL ARTICLE
Dissociation between high anti-PR3 titers (c-ANCA) and the clinical course of disease in a case of Wegener granulomatosis.
Wiener Klinische Wochenschrift 1998 October 17
In May 1984 a 58-year-old woman presented with a broad spectrum of clinical symptoms including malaise, arthralgia, hemoptysis and dyspnea, proteinuria and hematuria and a vasculitic necrotizing rash. Bronchial biopsies revealed subglottic granulomatous lesions and renal biopsies showed necrosis, extracapillary proliferation and crest formation, confirming the diagnosis of Wegener granulomatosis. Positive c-ANCA and anti-proteinase 3 subfraction (anti-PR3) titers were first analysed in 1991. Clinical remission was achieved by standard immunosuppressive therapy and renal function was stabilised. Several minor relapses were treated with pulsed intravenous cyclophosphamide but the symptoms could not be completely controlled. Eight years after the onset of disease, a dramatic increase in anti-PR3 titers was observed (34438 U/ml, normal range < 10, ELISA), followed 3 months later by a clinically apparent relapse. Immunosuppressive therapy was reinstituted without clinical improvement. At this point plasmapheresis resulted in an amelioration of clinical symptoms as well as a reduction in anti-PR3 titers. Concomitant immunosuppressive therapy was administered with oral corticosteroids. Forty days later anti-PR3 titers increased, reaching 75000 U/ml twelve months later, however this time without associated clinical symptoms. During the following months the patient had a further transient deterioration of pulmonary and renal function due to secondary bacterial infection which was successfully treated with antibiotics. A nephritic sediment was not present during these episodes. Curiously, the anti-PR3 titers have remained excessively elevated for the last three years.
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