Late onset asthma and pulmonary infiltrates

We are discussing a patient who was initially diagnosed and treated as pulmonary tuberculosis, but on follow up the clinical, radiological features and investigations were highly suggestive of pulmonary vasculitis. Pulmonary vasculitis occurs in a number of conditions including polyarteritis nodosa, SLE, and Wegener's granulomatosis. This can be the sole manifestation of these diseases for months to years before other systemic manifestations appear