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Eur J Cardiothorac Surg 2003;24:192-195
© 2003 Elsevier Science NL

Video-assisted mediastinoscopic lymphadenectomy (VAMLA) – a method for systematic mediastinal lymphnode dissection

Department of Thoracic Surgery, Lungenklinik Hemer, Theo-Funccius-Str. 1, D- 58675 Hemer, Germany

Received 8 November 2002; received in revised form 19 February 2003; accepted 19 March 2003.

^* Corresponding author. Tel.: +49-2372-9082243; fax: +49-2372-9089243
e-mail: gunda.leschber{at}lungenklinik-hemer.de

Objective: Video-assisted mediastinal lymphadenectomy (VAMLA) increases quality of mediastinal lymph node staging in bronchial carcinoma. The video-mediastinoscope allows systematic lymphadenectomy by bimanual preparation. Complete bilateral resection of lymph nodes in stations 1, 2, 3, 4 and 7 (Naruke) can safely be done after visualization of limiting structures (trachea, main bronchi, oesophagus, pericardium, pulmonary artery, aorta, upper vena cava and azygos vein). In this initial study, we compared histopathological findings from VAMLA with final lymph node staging from subsequent thoracotomy. Methods: Between January 2001 and December 2001, 25 patients were operated by VAMLA (among 162 mediastinoscopies), two patients for diagnostic purposes and 23 for staging of bronchial carcinoma. Eighteen patients underwent subsequent thoracotomy for tumor resection and systematic lymphadenectomy. Pathological findings were reviewed. Results: In VAMLA, lymph node dissection of station 2R, 2L and 4R was achieved in 96, 28 and 92%, respectively, whereas resection of lymph nodes in station 7 and 4L was performed in 100%. Other locations were dissected in 44%. A mean of 8.6 lymph nodes were removed in each patient. No residual lymph node tissue was found in the subcarinal compartment at open surgery. When comparing histopathological staging from VAMLA with final pathology, there were no false negative results. Seventeen patients who had N0 disease at VAMLA proved to be N0 or N1 at thoracotomy, one patient diagnosed as N2 at mediastinoscopy had N2 disease at final pathology. The only complication observed in VAMLA was a blood loss of >100 ml in 12% of patients without need for transfusion or surgical intervention. Conclusion: Mediastinal lymph node staging is improved by VAMLA. A systematic lymphadenectomy is performed bimanually through the video mediastinoscope. The number of lymph nodes removed is doubled compared to standard mediastinoscopy. There were no false negative results at final pathology. This new technique presents the basis for video-assisted thoracic surgery (VATS) lobectomy because complete resection of the mediastinal lymph nodes can be achieved by VAMLA. Potential complications of VAMLA such as injury of major mediastinal vessels, airways, pneumothorax or recurrent laryngeal nerve injury indicate the need for a full thoracic surgical infrastructure.

Key Words: Video-assisted surgery • Mediastinoscopy • Lymphadenectomy • Staging of lung cancer • Lung neoplasm

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