[A case of Wegener's granulomatosis presenting as severe acute respiratory failure].

A 19-year-old man was admitted to another hospital. Pulmonary suppuration was diagnosed and was treated with antibiotics. However, he developed acute respiratory failure, which required intubation and ventilation with 100% oxygen. After treatment with nitric oxide inhalation and corticosteroid pulse therapy, the patient's condition stabilized and he gradually regained a satisfactory pulmonary function. He was discharged about 3 months after admission with a pulmonary function close to normal. Approximately 1 month later, the patient was admitted to our hospital because of a 2-week history of fever and chest and ocular pain. A chest radiograph obtained upon admission showed a nodule with a cavity in the upper lobe of the right lung. Pulmonary suppuration was again suspected, and antibiotics were given. The fever persisted and chest radiograph on hospital day 19 showed marked extension of the nodules. At that time, the patient complained of nasal obstruction and hoarseness and his sclera showed intense congestion, indicating episcleritis. Wegener's granulomatosis was diagnosed on the basis of the clinical picture, PR3-ANCA titer (63 EU) and nasal biopsy findings. After treatment with prednisolone and cyclophosphamide, his condition stabilized, and he recovered gradually. However, his condition remains poor despite continued therapy. This is an extremely rare case of Wegener's granulomatosis presenting as severe acute respiratory failure.