HOXC13 and head and neck squamous cell carcinoma: This lncRNA has been previously identified as a cancer biomarker in cervical cancer [60], breast cancer [61], glioma [62], hepatocellular carcinoma [63], cholangiocarcinoma [64], and head and neck squamous cell carcinoma [65–67], which emphasizes the absence of HOXC13-AS expression in most normal tissues except the skin.