SACK1D and esophageal cancer: FAM83D gene is located on chromosome 20q which is frequently amplified thus resulting in high expression in the majority of human cancer types including ovarian cancer, colorectal cancer, gastric cancer, esophageal cancer, lung cancer, breast cancer, hepatocellular carcinoma and pancreatic adenocarcinoma [11, 13, 16–20, 22, 35, 36].