Across TCGA pan-cancer cohorts, COL4A4 mass-spec protein is linked to patient survival in 3 of 34 cancer types, making it a survival-associated COL4A4 data layer compared with 22 for mass-spec protein and 7 for mutation status.
The strongest signal is observed in lung adenocarcinoma (LUAD), where higher COL4A4 mass-spec protein is associated with worse overall survival. In most high-consensus cancer types, elevated COL4A4 expression acts as an unfavorable survival marker, although some lineages such as LSCC show a favorable association.
LUAD, CCRCC, and LSCC are the cancer types where COL4A4 mass-spec protein most reproducibly stratifies survival.