Differences in prognosis of Siewert II and III oesophagogastric junction cancers are determined by the baseline tumour staging but not its anatomical location

摘要

Background: The anatomical Siewert classification for adenocarcinoma of the oesophagogastric junction (OGJ) was dictated by the potential differences in tumour epidemiology and pathology. However, there are some uncertainties whether the distinction of true carcinoma of the cardia (type II) and subcardial gastric cancer (type III) is of clinical value.