In addition, we used the data of Kaplan–Meier plotter RNA‐seq dataset to further study the effects of the mRNA expression levels of MYL9 on prognosis in different tumors, results showing that its reduction was obviously linked with a better OS and relapse‐free survival (RFS) in the majority of cancers except for sarcoma (Figure S7). Here, MYL9 is linked to sarcoma.