Across TCGA pan-cancer cohorts, FEM1B mass-spec protein differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of FEM1B’s most consistent transcriptional readouts.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where FEM1B mass-spec protein is more highly expressed in tumor relative to normal tissue. In most cancer types FEM1B is over-expressed in tumor, although a few such as LUAD show the opposite, repressed pattern.
HNSC, LUAD, and PDAC are the cancer types where FEM1B tumor–normal differential expression is most reproducible.