For patients diagnosed with early gastric cancer involving submucosal invasion, super-ESD indications, or lymph node metastasis, a combination of preoperative endoscopic ultrasound and abdominal contrast-enhanced CT was utilized to ascertain the depth of tumor invasion and to identify any suspicious metastatic lymph nodes in the vicinity of the stomach. Subsequently, a local full-thickness resection, coupled with or followed by individualized precise lymph node dissection, was conducted to fulfill the following objectives: ① To investigate the safety, feasibility, and efficacy of local resection for patients meeting super-ESD criteria; ② To offer a clinical foundation for the individualized and precise lymph node dissection treatment of early gastric cancer.

Inclusion Criteria:

1. Age 18-70 years old;
2. Endoscopic pathological diagnosis: adenocarcinoma;
3. Enhanced abdominal CT combined with endoscopic ultrasound clinical staging: T1bN0-1M0.
4. Has not received other treatment;
5. No other serious comorbidities;
6. Agree to participate in the study and sign the informed consent form.

Exclusion Criteria:

1. Pregnant or breastfeeding women
2. History of previous abdominal surgery
3. History of other previous malignancies
4. Can patients with severe heart, lung, brain diseases tolerate surgical treatment