Across TCGA pan-cancer cohorts, SIGIRR mass-spec protein is linked to patient survival in 6 of 34 cancer types, making it a survival-associated SIGIRR data layer compared with 26 for mass-spec protein and 2 for mutation status.
The strongest signal is observed in clear cell renal cell carcinoma (CCRCC), where higher SIGIRR mass-spec protein is associated with better disease-free survival. In most high-consensus cancer types, elevated SIGIRR expression acts as an unfavorable survival marker, although some lineages such as CCRCC and HNSC show a favorable association.
CCRCC, LUAD, and HNSC are the cancer types where SIGIRR mass-spec protein most reproducibly stratifies survival.