This clinical trial is evaluating a new, function-preserving surgical technique for patients with early-stage cancer in the upper part of the stomach.
The current standard treatment is a Laparoscopic Total Gastrectomy (LTG), which involves the complete removal of the stomach. This study compares the standard LTG with an innovative procedure called Laparoscopic Proximal Gastrectomy combined with a novel anti-reflux reconstruction (LPG-tbROSF). This new technique removes only the cancerous upper portion of the stomach, aiming to preserve digestive functions and reduce post-surgery complications like acid reflux.
The main goal is to see if patients who receive the new, stomach-preserving surgery experience less body weight loss one year after the procedure compared to those who undergo the standard total gastrectomy. The research will also compare the two surgeries in terms of post-operative quality of life, nutritional status, acid reflux symptoms, safety, and long-term cancer outcomes.
The study is a multi-center, prospective, randomized controlled trial that plans to enroll 120 patients with localized cancer in the upper stomach.
Aged from 18 to 75 years old;
Histologically confirmed proximal gastric adenocarcinoma, CT1-2N0M0 stage;
The tumor was located in the proximal third of the stomach.
ECOG score of 0 or 1;
Concurrent with other active malignant tumors, or a history of other malignant tumors within 5 years (excluding basal cell carcinoma of the skin and carcinoma in situ of the cervix);
Severe cardiovascular diseases: such as NYHA class Ⅲ and above cardiac dysfunction, recent myocardial infarction (within 6 months), refractory hypertension or arrhythmia;
Severe respiratory diseases: severe impairment of lung function (FEV1%<50%) or chronic respiratory failure;
Severe liver and kidney dysfunction: ALT/AST > 3 times the upper limit of normal, or eGFR < 30 mL/min/1.73m²;
Parallel
Laparoscopic Proximal Gastrectomy with Tubular Stomach-Based Right-Opening Single Flap Valvuloplasty (LPG-tbROSF)
Procedure/SurgeryExperimental group (tbROSF group): Participants will undergo laparoscopic proximal gastrectomy (LPG), with esophagogastric reconstruction performed using tubulized-stomach right-open single-flap valvuloplasty (tbROSF). Control group (LTG group): Participants will undergo laparoscopic total gastrectomy (LTG), with digestive tract reconstruction performed using a standard Roux-en-Y anastomosis.
Percentage of weight loss at 12 months postoperatively
Definition: The study's single primary endpoint is the percentage of body weight loss at 12 months post-operation. It is defined as the percentage decrease in a patient's body weight from the preoperative baseline to the 12-month (±7 days) postoperative follow-up. Objective: This endpoint serves to directly and objectively evaluate the superiority of the investigational LPG-tbROSF procedure in maintaining mid-term nutritional status compared to the standard LTG procedure. Formula: The calculation is performed as follows: Percentage of Weight Loss (%) = \[ (Baseline Preoperative Weight - Postoperative 12-Month Weight) / Baseline Preoperative Weight \] × 100%.
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