Across TCGA pan-cancer cohorts, HOXB1 RNA differs between tumor and matched normal tissue in 5 of 18 cancer types tested, making tumor–normal expression one of HOXB1’s most consistent transcriptional readouts.
The strongest signal is observed in kidney renal clear cell carcinoma (KIRC), where HOXB1 RNA is repressed in tumor relative to normal tissue. In most cancer types HOXB1 is over-expressed in tumor, although a few such as KIRC and KIRP show the opposite, repressed pattern.
KIRC, KIRP, and BRCA are the cancer types where HOXB1 tumor–normal differential expression is most reproducible.