Across TCGA pan-cancer cohorts, MS4A18 RNA differs between tumor and matched normal tissue in 4 of 18 cancer types tested, making tumor–normal expression one of MS4A18’s most consistent transcriptional readouts.
The strongest signal is observed in lung squamous cell carcinoma (LUSC), where MS4A18 RNA is repressed in tumor relative to normal tissue. In most cancer types MS4A18 is over-expressed in tumor, although a few such as LUSC show the opposite, repressed pattern.
LUSC, PRAD, and LUAD are the cancer types where MS4A18 tumor–normal differential expression is most reproducible.