These good acute-phase and intermediate results, along with low morbidity rates and no mortality, suggest that the organ-preserving local endoscopic procedure including EMR and PDT is an attractive alternative to oesophageal resection. Therefore, endoscopic therapy might replace radical oesophageal resection in future in cases of intraepithelial high-grade neoplasia and early mucosal adenocarcinoma in Barrett's oesophagus.
As in mucosal BC, ER is associated with favorable outcomes even in case of "low-risk" submucosal BC. Further and larger clinical trials are required before a general recommendation for ER as the treatment of choice in "low-risk" submucosal BC can be given.
In suspected early cancer in Barrett's esophagus, EUS is superior to CT for T staging and N staging. As CT had no influence on the TNM classification in any of these patients, it may be possible to dispense with this method as a staging procedure in patients with cancer in Barrett's esophagus. By contrast, EUS is required in order to differentiate between patients with cancer in Barrett's esophagus in whom endoscopic therapy is suitable and those in whom surgical treatment is required.
The diagnostic accuracy of EUS in patients with esophageal cancer is still unsatisfactory. T2 cancers in particular are frequently overstaged, with a significant effect on the subsequent treatment strategy.
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