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A 51-year-old woman was admitted to our hospital for cough, fever, purpura in the legs, and salivary gland swelling. Six years ago, she had been diagnosed with bronchial asthma and was treated with a combination of inhaled corticosteroid and long-acting beta2-agonist. Blood examination showed increased eosinophils at 3027 cells/μL and elevated levels of immunoglobulin (Ig) G4 at 261 mg/dL and C-reactive protein at 2.76 mg/dL. Chest radiograph and computed tomography (CT) showed infiltrates in the bilateral lower lobes. Neck CT showed bi