Definition: The area covering the terminal portion of ESOPHAGUS and the beginning of STOMACH at the cardiac orifice.
diseases: coordinate IM with ESOPHAGEAL DISEASES (IM) or specific esophageal disease (IM); neoplasms: coordinate IM with STOMACH NEOPLASMS (IM) or ESOPHAGEAL NEOPLASMS (IM) depending on text
ExamplesEsophageal Sphincter, Lower