LINC00355, also named as lnc-PCDH9-13:1, has been found to abnormally expressed in multiple malignancies such as esophageal squamous cell carcinoma (33), papillary renal cell carcinoma (34), and hepatocellular carcinoma (HCC) (35). Here, PCDH9 is linked to esophageal squamous cell carcinoma.