Across TCGA pan-cancer cohorts, OR2L2 RNA differs between tumor and matched normal tissue in 5 of 18 cancer types tested, making tumor–normal expression one of OR2L2’s most consistent transcriptional readouts.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where OR2L2 RNA is more highly expressed in tumor relative to normal tissue. In most cancer types OR2L2 is over-expressed in tumor, although a few such as BRCA and COAD show the opposite, repressed pattern.
HNSC, BRCA, and COAD are the cancer types where OR2L2 tumor–normal differential expression is most reproducible.