Across TCGA pan-cancer cohorts, RPS4X mass-spec protein is linked to patient survival in 6 of 34 cancer types, making it a survival-associated RPS4X data layer compared with 27 for mass-spec protein and 3 for mutation status.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where higher RPS4X mass-spec protein is associated with better disease-free survival. In most high-consensus cancer types, elevated RPS4X expression acts as an unfavorable survival marker, although some lineages such as HNSC and LUAD show a favorable association.
HNSC, CCRCC, and PDAC are the cancer types where RPS4X mass-spec protein most reproducibly stratifies survival.