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We demonstrated that the incidence of MM and/or TCM in the lymph nodes of patients with gastric cancer is quite high, and that such metastasis is associated with the prognosis of patients with pN0. Examination of E-cad expression in biopsy tumor specimens may be useful for predicting MM and/or TCM.

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Although less invasive surgery, such as reduction of lymphadenectomy, may be suitable for superficial cancer, it should be performed with special care in advanced cancer.

Intraoperative molecular detection of circulating tumor cells in patients with biliary-pancreatic cancer relates to a high risk of hematogenous metastasis and is associated with unfavorable prognosis even after curative resection.

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