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J Thorac Cardiovasc Surg 1999;117:239-245
© 1999 Mosby, Inc.

GENERAL THORACIC SURGERY

INDICATIONS FOR THREE-FIELD DISSECTION FOLLOWED BY ESOPHAGECTOMY FOR ADVANCED CARCINOMA OF THE THORACIC ESOPHAGUS

From the First Department of Surgery, Kumamoto University, School of Medicine,^a Kumamoto, and Izumi City Hospital,^b Izumi City, Kagoshima, Japan.

Received for publication Nov 10, 1997. Revisions requested Jan 22, 1998. Revisions received July 9, 1998. Accepted for publication Sept 16, 1998. Address for reprints: Yoichi Tabira, MD, First Department of Surgery, Kumamoto University School of Medicine, 1-1-1, Honjo Kumamoto City, Kumamoto 860 -0811, Japan.

Objective: The aim of this study was to evaluate the indication for 3-field lymphadenectomy (3-field dissection) followed by esophagectomy for locally advanced carcinoma of the thoracic esophagus in the presence of lymph node metastasis.
Methods: From January 1983 to December 1995, 86 patients with thoracic esophageal carcinoma invading muscularis propria or adventitia underwent radical subtotal esophagectomy after preoperative chemotherapy. Forty-six of the 86 patients underwent a 2-field dissection (mediastinal and abdominal nodes, group A), and 40 patients underwent a 3-field dissection (bilateral cervical, mediastinal, and abdominal nodes, group B). Survival curves were compared between the 2 groups after stratification according to the degree of lymph node involvement (number of positive nodes and involvement of intrathoracic or intrathoracic recurrent nerve chain nodes). Potential prognostic factors of these 86 patients were evaluated by means of Cox regression analysis.
Results: There were no significant differences in age, sex ratio, depth of tumor invasion, pTNM classification, or number of positive nodes between the 2 groups. Among patients with positive intrathoracic nodes, the 5-year survival of group B (42%) was significantly longer than that of group A (13%, generalized Wilcoxon test P = .02). Among patients with 1 to 4 positive nodes, the 5-year survival of group B (54%) was significantly higher than that of group A (22%, P = .01). Multivariate analysis revealed the number of positive nodes, age, and pT4 stage to be significant predictors of survival in patients with thoracic esophageal carcinoma.
Conclusions: Three-field dissection for advanced carcinoma of the thoracic esophagus is effective in patients with 1 to 4 positive nodes.

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