How to diagnose IPF when autoimmune abnormalities are present?

How to diagnose idiopathic pulmonary fibrosis (IPF) when autoimmune screening reveals the presence of autoantibodies? Atypical presentations of IPF can be relatively common and interpreting the results of autoimmune screening when no connective tissue disease features are present can be difficult. In this presentation I cover what I would do in my practice (which may be different to your own depending on where you are located in the world and local policies).