Immunohistochemical expression of IFITM1 could be assessed in 91/96 (95 %) samples with esophageal squamous epithelium, 122/131 (93 %) samples with gastric mucosa, 56/73 (77 %) samples with intestinal metaplasia (gastric intestinal metaplasia or Barrett’s esophagus), 169/174 (97 %) samples with primary tumors, and 77/81 (95 %) samples with lymph node metastases. The gene discussed is IFITM1; the disease is Barrett esophagus.