Figure 2. Comparison of SPIB expression in breast, colon, liver, and lung tissues by immunohistochemistry. (A) Breast tissue. (B) Colon tissue. (C) Liver tissue. (D) Lung tissue, including lung adenocarcinoma (LUAD) and lung squamous carcinoma (LUSC). For the violin plot, red is cancer samples and blue is normal samples. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001.