Across TCGA pan-cancer cohorts, SNCA mass-spec protein is linked to patient survival in 4 of 34 cancer types, making it a survival-associated SNCA data layer compared with 25 for mass-spec protein and 3 for mutation status.
The strongest signal is observed in clear cell renal cell carcinoma (CCRCC), where higher SNCA mass-spec protein is associated with better disease-free survival. In most high-consensus cancer types, elevated SNCA expression acts as an unfavorable survival marker, although some lineages such as CCRCC and HNSC show a favorable association.
CCRCC, UCEC, and HNSC are the cancer types where SNCA mass-spec protein most reproducibly stratifies survival.