GLI1 and neoplasm: Importantly, correlation analysis revealed that the expression of FOXS1 was strongly correlated (R = 0.74, P < 0.001) with the expression of GLI1 in the STAD tumor dataset (Fig. 8A), whereas FOXS1 expression was not correlated with GLI1 expression in the TCGA STAD normal dataset (Fig. 8B), indicating an interplay between GLI1 and FOXS1 expression in STAD tumors.