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  • Title: [Distribution of sentinel lymph nodes in gastric cancer and factors correlated with its metastasis].
    Author: Wu YL, Yu JX, Gao SL, Yan HC, Xia Q, Huang CP.
    Journal: Zhonghua Wai Ke Za Zhi; 2004 Oct 22; 42(20):1240-3. PubMed ID: 15598372.
    Abstract:
    OBJECTIVE: To investigate the distribution of sentinel lymph nodes in gastric cancer, and evaluate clinicopathologic characteristics leading its metastasis. METHODS: The location of metastatic lymph nodes was analyzed retrospectively in 27 patients of gastric carcinoma with solitary lymph node metastases, and in 80 cases metastasis was limited to only 1 station in Japanese nodal classification. The clinicopathologic characteristics of the patients with solitary lymph node metastases and 111 cases without lymph node metastases were compared. RESULTS: Twenty-five in 27 cases with solitary lymph node metastases were limited in level I. Skip metastasis occurred in 2 cases. Sentinel lymph nodes of 16 cases in 21 patients with the tumors in the lower and middle third stomach were located in less curvature (No. 3) and in greater curvature (No. 4). Sentinel lymph nodes of 3 cases in 6 patients in the upper third stomach were located in right cardia (No. 1). Multivariate analysis showed that the frequency of sentinel lymph node metastasis of pT(3) lesion was significantly higher than that of pT(1) lesion with an odds ratio of 4.926 (P < 0.01). The frequency of sentinel lymph node metastasis in the tumor located in the upper third stomach was significantly higher than that in lower third stomach, with an odds ratio of 4.381 (P < 0.05). Early gastric cancer had lower risk for sentinel lymph node metastasis than that in Borrmann type I cancer, with an odds ratio of 0.082 (P < 0.05). CONCLUSIONS: Majority of sentinel lymph nodes are located in the regional perigastric lymph node groups close to the tumor. Skip metastasis is rare. Depth of invasion and location of tumor are correlated with sentinel lymph node metastasis. Sentinel lymph node assessment can instruct to determine extent of lymph node dissection for gastric cancer.
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