In contrast to pleural effusions but in agreement with previous reports (Ross‐Innes et al., 2012; Tangen et al., 2014), FOXA1 levels were increased in solid metastases (P = 0.002; mean staining percentage primary 53% vs. metastasis 74%; Wilcoxon signed rank test; Fig. S3). Here, FOXA1 is linked to Pleural effusion.