Lymph node metastases are an independent prognosis factor in gastric carcinoma (GC) patients. Radical lymphadenectomy can improve survival but it can also increase surgical morbidity. As a principle. sentinel node (SN) navigation surgery can avoid unnecessary lymphadenectomy without compromising prognosis. https://www.roneverhart.com/Doorking-1835-080-Telephone-Entry-System/