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Department of Thoracic Surgery, European Institute of Oncology, Via Ripamonti 435, Milan, 20141 Italy
(Email: lorenzo.spaggiari{at}ieo.it).
The article by Lanuti and colleagues [1] is important not only in terms of content but also because it offers further evidence that superior vena cava (SVC) resection is indicated to treat pulmonary and mediastinal malignancies. Technically speaking, the article confirms the feasibility of resection without cardiopulmonary support in all patients if selection is appropriate.
I would like to add our personal contribution on a biologic prosthesis we routinely use in all patients undergoing SVC resection. Our first patient with lung cancer to receive a bovine pericardial tube was operated on in 2003. He is still alive without any anticoagulant regimen, with a fully patent prosthesis, and no graft calcification. To date, we have used biologic bovine pericardial patch in 8 patients, and no graft-related complications have developed. Figure 1 shows the Y-bovine prototype pericardial tube we are studying for maximal SVC resection in mediastinal tumors.
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Considering the few patients operated on in a single center, it is difficult to randomize an adequate number of patients to demonstrate a statistically significant difference. It is also difficult to prove the hypothesis that chemotherapy may be effective in stages II and IIIA but completely ineffective in stage IIIB. Moreover, in our experience of extended resection for T4 lesions, almost all patients with recurrent disease present systemic rather than local recurrence, suggesting that a multimodal preventive approach is essential.
Because these patients may not tolerate adjuvant chemotherapy after such extended procedures, I would rather propose neoadjuvant chemotherapy. In addition, induction chemotherapy by three cycles of a platinum-based regimen may help improve patient selection, thereby excluding rapidly spreading disease not amenable to effective surgical treatment.
N2 disease is another important issue. First, SVC invasion by bulky N2 disease is a formal contraindication to surgical resection because of the poor prognosis of these patients. By contrast, the indication for resection in clinical (not bulky) N2 disease should be addressed in relation to the patient's clinical situation. N2 multilevel disease (mediastinoscopy-proven R4, R2 stations) should be considered an absolute contraindication and treated by chemoradiation therapy. However, single-station N2 disease (7 or R4 stations strictly adherent to the primary tumor) should be considered oncologically as N1 disease and eligible for resection after induction chemotherapy.
In conclusion, we currently use the following guidelines in the treatment of SVC for lung neoplasm:
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