Across TCGA pan-cancer cohorts, SDC3 mass-spec protein differs between tumor and matched normal tissue in 3 of 18 cancer types tested, making tumor–normal expression one of SDC3’s most consistent transcriptional readouts.
The strongest signal is observed in lung squamous cell carcinoma (LSCC), where SDC3 mass-spec protein is repressed in tumor relative to normal tissue. In most cancer types SDC3 is over-expressed in tumor, although a few such as LSCC and COAD show the opposite, repressed pattern.
LSCC, COAD, and LUAD are the cancer types where SDC3 tumor–normal differential expression is most reproducible.