Across TCGA pan-cancer cohorts, RNU6-999P RNA differs between tumor and matched normal tissue in 2 of 18 cancer types tested, making tumor–normal expression one of RNU6-999P’s most consistent transcriptional readouts.
The strongest signal is observed in thyroid carcinoma (THCA), where RNU6-999P RNA is repressed in tumor relative to normal tissue. In most cancer types RNU6-999P is over-expressed in tumor, although a few such as THCA show the opposite, repressed pattern.
THCA and BRCA are the cancer types where RNU6-999P tumor–normal differential expression is most reproducible.