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The Oncological Value of Omentectomy in Gastrectomy for Cancer.

AIM: The aim of this study was to determine the oncologic value of omentectomy in patients undergoing gastrectomy for gastric cancer.

METHODS: All consecutive patients with gastric cancer that underwent gastrectomy with curative intent between April 2012 and August 2015 were prospectively analyzed. The greater omentum was separately marked during operation and pathologically evaluated for the presence of omental lymph nodes and tumor deposits.

RESULTS: In total, 50 patients were included. The greater omentum harbored lymph nodes in nine (18 %) patients. The omental lymph nodes contained metastases in one (2 %) patient, still free of disease after 20 months. Omental tumor deposits were found in four (8 %) patients; one died <30 days postoperative and three developed peritoneal carcinomatosa after 4, 4, and 8 months. Patients with omental tumor deposits had a significantly reduced 1-year disease-free survival compared to patients without tumor deposits (0 vs. 58.7 %, p = 0.003). No predictive factors for omental tumor involvement could be identified.

CONCLUSION: Omental lymph node metastases or tumor deposits are present in 10 % of Western European patients undergoing gastrectomy for gastric cancer. Omentectomy has a prognostic and oncologic value in the curative treatment of patients with gastric cancer. As no predictive factors for omental tumor involvement could be identified, omentectomy should be the standard in gastrectomy for gastric cancer patients.

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