There is no standardized system for the classification of OGJ adenocarcinoma. The Siewart classification system is a classification scheme used for OGJ adenocarcinomas that has been adopted by many clinicians. Siewart described three different categories of OGJ adenocarcinoma, all based upon anatomic location: # A Type I tumor, located between 5 and 1cm proximal to the OGJ, is an adenocarcinoma that typically arises from an area of intestinal metaplasia of the esophagus and can infiltrate the OGJ from above. # A Type II tumor, located between 1cm proximal and 2cm distal to the OGJ, is a true adenocarcinoma of the gastric cardia. # A Type III tumor, located between 2 and 5 cm distal to the OGJ is a subcardial gastric carcinoma that typically infiltrates the EGJ from below. The classification system establishes guidelines for surgical approaches to tumor resection.
Oesophagogastric junctional adenocarcinoma
Poorly cohesive gastric carcinoma
Gastric lymphoma
Lymphocytic esophagitis
Nutcracker esophagus
Ceruminous adenocarcinoma
Barrett's esophagus
Esophageal candidiasis