Across TCGA pan-cancer cohorts, OR1L1 RNA differs between tumor and matched normal tissue in 1 of 18 cancer types tested, making tumor–normal expression one of OR1L1’s most consistent transcriptional readouts.
The strongest signal is observed in thyroid carcinoma (THCA), where OR1L1 RNA is repressed in tumor relative to normal tissue. In most cancer types OR1L1 is over-expressed in tumor, although a few such as THCA show the opposite, repressed pattern.
THCA are the cancer types where OR1L1 tumor–normal differential expression is most reproducible.