Abstract
This study was conducted to evaluate lymph node metastasis as a key prognostic factor in esophageal cancer. Metastatic lesions in lymph nodes were grouped by histological morphology as intracapsular or extracapsular, and the significance of lymph node metastasis was evaluated by relating metastatic lesions to clinical pathologic factors and patient prognosis. In our hospital, 46 of 81 patients who underwent resection of esophageal cancer developed lymph node metastasis. These 46 patients were enrolled in a study analyzing the relationship between the metastatic mode and the clinicopathological factors. The frequency of extracapsular metastasis was significantly high in patients with a profound depth of cancer, three or more metastases, distant metastasis (n3 and n4), or severe lymphatic invasion. The prognosis was significantly worse in patients with extracapsular metastasis, and this tendency was also seen even in patients with three or more metastases, limited metastasis (n1 and n2), or mild lymphatic invasion (ly0 and ly1). These findings suggest that the metastatic mode reflects the degree of esophageal cancer progression and is an important prognostic factor.
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