Across TCGA pan-cancer cohorts, PTPN18 mass-spec protein is linked to patient survival in 4 of 34 cancer types, making it a survival-associated PTPN18 data layer compared with 27 for mass-spec protein and 5 for mutation status.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where higher PTPN18 mass-spec protein is associated with worse disease-free survival. In most high-consensus cancer types, elevated PTPN18 expression acts as an unfavorable survival marker, although some lineages such as PDAC and LUAD show a favorable association.
HNSC, LSCC, and PDAC are the cancer types where PTPN18 mass-spec protein most reproducibly stratifies survival.