PRTN3 and fibrosis: In our results, we are surprised that a shorter duration of disease was associated with the fibrosis score in the tomographic findings; several studies have associated the presence of ACPA-positive with the presence of pulmonary damage, mainly interstitial pulmonary and fibrosis pulmonary pattern; however, to our knowledge, no study has linked shorter duration of disease with RA-ILD and positive ACPA.