In addition, five genes involved in the 47-mRNA metastasis-related model, including FABP4 [25, 26], GUCY2C [27–29], MEIS2 [30, 31], POU1F1 [32–34], and SLC25A11 [35] have been reported to be related to the metastasis of other human cancers. Here, GUCY2C is linked to cancer.