Laparoscopic Paraaortic Lymph Node Sampling in Gastric Cancer Patients with Suspected Paraaortic Lymph Node Metastasis

D2 lymphadenectomy is the standard approach for lymph node dissection in curable gastric cancer. However, paraaortic lymph node (PALN) dissection in addition to D2 lymphadenectomy has not been shown to improve survival rates and is therefore not routinely performed. Nevertheless, PALN sampling may be indicated for diagnostic purposes because it can provide critical information for accurate staging and treatment planning. Laparoscopic PALN sampling, however, poses significant challenges due to limited accessibility and visibility in the paraaortic region. Moreover, the proximity of major blood vessels, such as the abdominal aorta and renal vein, is another difficult aspect of the procedure. In this context, we present two cases to demonstrate practical strategies for facilitating laparoscopic PALN sampling. The procedure can be effectively performed by first identifying the ligament of Treitz and then, when necessary, fixing the small bowel mesentery to the abdominal wall using a tagging suture so that there is adequate vision and enough working space. This enables careful and precise dissection of the target tissue without compromising the feasibility and safety of the operation.