Several other studies have discussed the association between PCAT-1 and a variety of types of human malignancies, such as hepatocellular carcinoma [25, 26], gastric carcinoma [27, 28], colorectal carcinoma [29], esophageal carcinoma [30], cervical carcinoma [31] and osteosarcoma [32, 33]. This evidence concerns the gene PCAT1 and carcinoma of esophagus.