Additionally, the PFS curve indicated that high KCNQ4 expression was associated with adverse prognosis in GBMLGG, LGG, KIRP, KIPAN, and ACC patients, suggesting that KCNQ4 may serve as a promising prognostic marker for a variety of cancers (Supplementary Figs. 4, 5, 6, 7). This evidence concerns the gene KCNQ4 and cancer.