Across TCGA pan-cancer cohorts, PRMT9 mass-spec protein is linked to patient survival in 3 of 34 cancer types, making it a survival-associated PRMT9 data layer compared with 24 for mass-spec protein and 5 for mutation status.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where higher PRMT9 mass-spec protein is associated with better overall survival. In most high-consensus cancer types, elevated PRMT9 expression acts as an unfavorable survival marker, although some lineages such as HNSC and LUAD show a favorable association.
HNSC, UCEC, and LUAD are the cancer types where PRMT9 mass-spec protein most reproducibly stratifies survival.