Objective: Radical surgery for sigmoid colon cancer is commonly performed with complete mesocolic excision (CME) and apical lymph node dissection, reached by central vascular ligation (CVL) of the inferior mesenteric artery (IMA) and associated extended left colon resection. However, IMA branches can be ligated selectively according to tumor location with D3 lymph node dissection (LND), economic segmental colon resection and tumorspecific mesocolon excision (TSME) if IMA is skeletonized. This study aimed to compare left hemicolectomy with CME and CVL and segmental colon resection with selective vascular ligation (SVL) and D3 LND. Material and Methods: Patients (n= 217) treated with D3 LND for adenocarcinoma of the sigmoid colon between January 2013 and January 2020 were included in the study. The approach to vessel ligation, colon resection and mesocolon excision was based on tumor location in the study group, while in the comparison group, left hemicolectomy with routine CVL was performed. Survival rates were estimated as the primary endpoints of the study. Long- and short-term surgery-related outcomes were evaluated as the secondary endpoints of the study. Results: The studied approach to the IMA branch ligation was associated with a statistically significant decrease in intraoperative complication rates (2 vs 4, p= 0.024), operative procedure length (225.56 ± 80.356 vs 330.69 ± 175.488, p< 0.001), and severe postoperative morbidity (6.2% vs 19.1%, p= 0.017). Meanwhile, the number of examined lymph nodes significantly increased (35.67 vs 26.69 per specimen, p< 0.001). There were no statistically significant differences in survival rates. Conclusion: Selective IMA branch ligation and TSME resulted in better intraoperative and postoperative outcomes with no difference in survival rates.

Неоадъювантная химиотерапия является стандартом лечения многих опухолей, в особенности желудочно-кишечного тракта. Данный подход имеет много потенциальных преимуществ, включая регресс опухоли, раннее начало лечения микрометастазов, а также возможность оценивать биологию опухоли, тем самым персонализируя подход к лечению. В настоящее время неоадъювантная химиотерапия не является стандартом лечения местно-распространенного рака ободочной кишки, что связано с неточностью предоперационного стадирования, возможностью прогрессирования опухоли, а также отсутствием достаточного количества рандомизированных клинических исследований.

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cancer in the era of minimally invasive surgery: a step-by-step description for the surgeon unacquainted with this complex procedure with the use of the laparoscopic approach.