A significant correlation was found between staining intensities of Galectin-1 in cancer-associated stromal cells and the differentiation of PDAC, the staining intensities of Galectin-1 in poorly-differentiated tissues was markedly stronger than that in well or moderately differentiated tissues (p = 0.0008, p = 0.0202, respectively), and also the staining intensities of Galectin-1 in moderately-differentiated tissues was higher than that in well-differentiated tissues (p = 0.0102) (Table 1, Figure 1c-f). This evidence concerns the gene LGALS1 and cancer.