Across TCGA pan-cancer cohorts, IFNK RNA differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of IFNK’s most consistent transcriptional readouts.
The strongest signal is observed in kidney renal clear cell carcinoma (KIRC), where IFNK RNA is more highly expressed in tumor relative to normal tissue. In most cancer types IFNK is over-expressed in tumor, although a few such as BRCA and THCA show the opposite, repressed pattern.
KIRC, BRCA, and THCA are the cancer types where IFNK tumor–normal differential expression is most reproducible.