LAUSR

INTRODUCTION Anti-neutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV) is a rare and life-threatening autoimmune disease. Immunoadsorption (IA) is a potential approach in treating AAV. PATIENTS AND METHODS A 76-year-old male patient was admitted with hemoptysis and oliguria, progressed rapidly into pulmonary hemorrhaging, acute kidney damage, and multi-organ failure. He was diagnosed as MPO-ANCA-positive vasculitis by immunological detection and kidney biopsy in the case report. IA combined with methylprednisolone to induce and alleviate the disease effectively, and cyclophosphamide (0.2g every other day, a total of 1g for the first time, after the patients tolerated, 10mg/kg every 3 weeks for 6 months in total) combined with prednisone for maintenance therapy. RESULTS AND DISCUSSION Although both kidneys suffered severe deterioration requiring long-term hemodialysis replacement therapy, their pulmonary function was restored. Furthermore, clinical and serological symptoms of the disease were successfully controlled. Consequently, IA treatment may quickly remove IgG and ANCA to efficiently control clinical symptoms, especially in patients presenting with alveolar hemorrhaging and acute renal failure.