Reconstruction With a Lawrence-Hunt Jejunal Pouch After Total Gastrectomy

Inclusion Criteria: * Adults aged 18-75 years. * Histologically confirmed gastric tumor (including adenocarcinoma, gastrointestinal stromal tumor - GIST- or neuroendocrine tumor) or patients with CDH1 mutation, scheduled for TG with a maximal esophageal resection of \< 6 cm. * Informed consent capability. Exclusion Criteria: * Prior abdominal surgeries affecting the jejunum. * Severe comorbidities or non-appropriate organ function: uncontrolled diabetes with HbA1C \> 7.5, significant heart disease: New York Heart Association (NYHA) functional classification Class III or IV, chronic obstructive pulmonary disease (COPD) requiring oxygen supplementation or continuous positive airway pressure (CPAP), chronic corticosteroid therapy (daily for more than 6 months), neutrophil count \< 2000/mm3, hemoglobin \< 8.0 g/dL, platelet count \< 100,000/mm3, serum total bilirubin \> 1.5 mg/dL, serum aspartate aminotransferase (AST) \>100 IU/L, serum alanine aminotransferase (ALT) \>100 IU/L, and creatinine clearance (CCr) ≥ 50 mL/min), ECOG performance status \> 1. * Pregnancy or breastfeeding.