The percentages of S100A9+ cells (Gate 1 + 2) and S100A9+CD163− (Gate 1) showed comparative characteristics among the three groups, and were significantly higher in IPF patients than in iNSIP patients (p < 0.01); the percentages of S100A9+CD163− (Gate 1) were represented using s log scale (Fig. 1). The gene discussed is S100A9; the disease is idiopathic pulmonary fibrosis.