A Prospective Observation Registry Study on the Alimentary Reconstruction After Radical Proximal Gastrectomy

Aged 18-80 years

Tumor located in the upper or esophagogastric junction (EGJ), and curative resection with more than 1/2 remant is expected to be achievable by proximal gastrectomy with D2 lymphadenectomy (also apply to multiple primary cancers);

Clinical stage T1NxM0 (According to AJCC-8th TNM staging system) of the upper stomach or diameter of EGJ cancer less than 4cm with invading esophgus no more than 2cm without any distant metastasis;

Primary lesion is pathologically diagnosed as gastric adenocarcinoma, such as papillary adenocarcinoma, tubular adenocarcinoma, mucinous adenocarcinoma, poorly cohesive carcinoma (including signet ring cell carcinoma and other variants), and mixed adenocarcinoma;