Prognostic value of radiological fndings indeterminate for UIP pattern and anterior upper lobe honeycomb-like lesion in chronic fbrosing interstitial lung disease associated with MPO-ANCA

Myeloperoxidase antineutrophil cytoplasmic antibody (MPO-ANCA) is often positive in patients with interstitial lung disease (ILD), which is also often present in patients with microscopic polyangiitis (MPA). A possible association between MPO-ANCA, MPA, and idiopathic ILD remains unclear.