What is your approach to management of pulmonary fibrosis in patients with a history of microscopic polyangiitis who do not have other active organ involvement?  

ILD is an important organ manifestation in AAV, typically seen in patients with MPO-ANCA where ~20% of patients have ILD which often precedes the diagnosis of AAV. The most common radiographic pattern is UIP. ILD has been associated with a higher risk of mortality in AAV in multiple series including...