Mediastinal lymph node enlargement predicts progressive pulmonary fibrosis

OBJECTIVE: To determine whether mediastinal lymph node enlargement (MLNE) predicts progressive pulmo-nary fibrosis (PPF). METHODS: A total of 800 patients hospitalised for interstitial lung diseases (ILDs) were included in our study. The clinical presentations, radiographic features and laboratory findings of the patients were reviewed. RESULTS: MLNE was present in 313 (39.1%) ILD patients and were associated with higher total fibrosis score and risk of death than ILD patients without MLNE. The risk factors for PPF were age (OR 1.044, 95% CI 1.020-1.069; P , 0.001), the total extent of fibrosis (OR 1.396, 95% CI 1.116-1.746; P = 0.003) and MLNE (OR 2.130, 95% CI 1.362-3.332; P = 0.001) compared to non-PPF. Multivariable analysis showed that age, the lactate dehydrogenase level, MLNE, the total fibrosis score and pulmonary arterial systolic pressure were risk/prognostic factors for ILD patients. The model was robust in patients with idiopathic pulmonary fibrosis. However, the only risk/ prognostic factor common to other ILD subgroups was the total fibrosis score. CONCLUSIONS: MLNE is associated with higher total fibrosis score and worse prognosis in ILD patients and could predict the occurrence of PPF. The only risk/ prognostic factor applicable to all subgroups of ILDs is the total pulmonary fibrosis score.