Across TCGA pan-cancer cohorts, CST9 RNA differs between tumor and matched normal tissue in 5 of 18 cancer types tested, making tumor–normal expression one of CST9’s most consistent transcriptional readouts.
The strongest signal is observed in kidney renal clear cell carcinoma (KIRC), where CST9 RNA is repressed in tumor relative to normal tissue. In most cancer types CST9 is over-expressed in tumor, although a few such as KIRC and KICH show the opposite, repressed pattern.
KIRC, KICH, and KIRP are the cancer types where CST9 tumor–normal differential expression is most reproducible.