Across TCGA pan-cancer cohorts, APP mass-spec protein is linked to patient survival in 5 of 34 cancer types, making it a survival-associated APP data layer compared with 22 for mass-spec protein and 4 for mutation status.
The strongest signal is observed in pancreatic ductal adenocarcinoma (PDAC), where higher APP mass-spec protein is associated with worse disease-free survival. In most high-consensus cancer types, elevated APP expression acts as an unfavorable survival marker, although some lineages such as HNSC show a favorable association.
PDAC, CCRCC, and LSCC are the cancer types where APP mass-spec protein most reproducibly stratifies survival.