We stained a tissue microarray obtained from patients with lung cancer and found that IRF9 was expressed in both tumor and stromal cells in different types of lung cancers, including LUAD (Figure 1a), adenosquamous cell carcinoma, squamous cell carcinoma, small-cell carcinoma, and bronchioloalveolar carcinoma (Figure S1). The gene discussed is IRF9; the disease is small cell carcinoma.