Across TCGA pan-cancer cohorts, PPIF mass-spec protein is linked to patient survival in 5 of 34 cancer types, making it a survival-associated PPIF data layer compared with 24 for mass-spec protein and 2 for mutation status.
The strongest signal is observed in lung squamous cell carcinoma (LSCC), where higher PPIF mass-spec protein is associated with better disease-free survival. In most high-consensus cancer types, elevated PPIF expression acts as an unfavorable survival marker, although some lineages such as LSCC and HNSC show a favorable association.
LSCC, HNSC, and CCRCC are the cancer types where PPIF mass-spec protein most reproducibly stratifies survival.