In HNC tumor cells and cell lines (FaDu, Cal-27, SCC4, and SCC9), FKBP9P1 (FKBP prolyl isomerase 9 pseudogene 1) pseudogene transcript abundance was found to correlate with advanced tumor stage and poor prognosis of patients by enhancing tumor cell proliferation, migration, and invasion, possibly by interacting with the PI3K/AKT signaling pathway [26]. This evidence concerns the gene FKBP9P1 and neoplasm.