A. Forestier

Asymptomatic bilateral pulmonary embolism in Churg–Strauss syndrome

To the Editor: Churg–Strauss syndrome (CSS) is a systemic small-sized vessel vasculitis, characterised by severe asthma, transient pulmonary infiltrates, and blood and tissue eosinophilia [1]. CSS can affect several organs, including the lungs, heart, kidneys and peripheral nervous system. Anti-neutrophil cytoplasm autoantibodies (ANCA) mainly directed against myeloperoxidase (MPO) are detected in ∼40% of patients and are associated with renal involvement. Several studies have focused on venous thromboembolic events (VTE), which are an emerging clinical condition in ANCA-associated vasculitides (AAV) [2, 3]. Herein, we report the case of a patient with newly diagnosed CSS and totally asymptomatic pulmonary embolism, and discuss the features, pathogenesis and management of VTE in CSS. In February 2011, a 61-yr-old male was referred for recent asthenia, diffuse arthromyalgia and blood eosinophilia. His past medical history included high blood pressure treated with amlodipine. There were no other risk factors for VTE other than age and inflammatory state. His recent history included late-onset asthma, which started 1 yr earlier and required various combined inhaled corticosteroids, bronchodilators and several short courses of oral corticosteroids. In early December 2010, the patient complained of general weakness, weight loss and diffuse myalgia. In late December, another asthma flare-up was successfully treated with a course of oral prednisolone (1 mg·kg−1 per day for 5 days), which was effective for both myalgia and weakness. Unfortunately, muscle and joint pain immediately relapsed as soon as corticosteroids were discontinued, while respiratory symptoms had improved. In February 2011, a thoracic computed tomography (CT) scan was performed, focusing on the parenchyma not vessels. No lesions were reported. At the same time, distal paresthesia appeared and subsequently concerned the lower left and upper right limbs. Following this, the patient was referred to our department (Internal Medicine …