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Ann Thorac Surg 1995;59:209-214
© 1995 The Society of Thoracic Surgeons
Department of Surgery and Institute of Immunology, University of Munich, Munich, Division of Thoracic Surgery, Central Hospital Gauting, Gauting, Germany
Accepted for publication August 12, 1994.
* Address reprint requests to Dr Izbicki, Department of Surgery, University of Hamburg, Martinistrape 52, 20246 Hamburg, Germany.
The extent of lymphadenectomy in the treatment of non-small cell lung cancer is still a matter of controversy. While some centers perform mediastinal lymph node sampling with resection of only suspicious lymph nodes, others recommend a radical, systematic mediastinal lymphadenectomy (LA) to improve survival and achieve a better staging. Herein we report on the impact of LA on tumor staging in a controlled, prospective, randomized clinical trial comparing lymph node sampling and LA in a total of 182 patients with operable non-small cell lung cancer. Regardless of the type of lymphadenectomy performed, the percentage of patients with pathologic N1 or N2 (sampling: n = 23, 23.0%0; LA: n = 22, 26.8%) disease was very similar in both groups, indicating that systematic radical lymphadenectomy is not an essential prerequisite to determine the N stage of a patient. In contrast, the number of patients detected to have lymph node involvement at multiple levels was significantly increased by LA. In the lymph node sampling group only 4 of 23 patients (17.4%) with N2 disease were found to have more than one lymph node level involved, whereas LA results in the detection of excessive N2 disease in 12 of 21 patients (57.2%; p = 0.007), which was associated with a shorter distant metastases-free (p = 0.021) and overall survival. In conclusion, LA is not essential to determine the N stage of a patient, but results in a more detailed staging of the N2 region, which is of prognostic significance. Therefore, it might be useful to identify patients with a higher risk for tumor relapse.
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