Abstract
Oesophageal and gastric cancers are a significant cause of morbidity and mortality worldwide. Despite improvements in surgical techniques, radiation and chemotherapy, the prognosis of both cancers remains poor. Immunohistochemical and experimental studies indicate that the concept of micrometastasis is applicable to oesophageal and gastric cancer. New staging approaches, including immunohistochemistry and real-time reverse transcriptase-polymerase chain reaction (RT-PCR) of various markers, have been proposed for a more accurate staging of oesophageal and gastric cancer. Preliminary results suggest that real-time RT-PCR of markers for intestinal differentiation, such as guanylyl cyclase C (GC-C), might be useful for both the detection of premalignant conditions, such as intestinal metaplasia and the detection of micrometastasis from adenocarcinoma of the upper intestinal tract. Standard curative treatment options for oesophageal cancer include surgery or chemoradiotherapy. Chemotherapy is an option for the treatment of advanced and recurrent oesophageal cancer. Standard curative treatment for gastro-oesophageal junction and gastric cancer includes surgery and adjuvant chemoradiotherapy. Chemotherapy is an option for the treatment of advanced and recurrent gastric cancer.
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