MPO and interstitial lung disease: A retrospective search of the Western Australian public sector pathology laboratory information system was performed from January 2016 to December 2023 to identify all people who had recorded a positive MPO‐antibody titre (> 3.5 units/mL) and had attended the Sir Charles Gairdner Hospital Respiratory outpatient clinic for a multidisciplinary team (MDT) consensus diagnosis of ILD.