Evaluation of video-assisted thoracoscopic surgery for pulmonary metastases: 11-years of experience.

BACKGROUND: Although video-assisted thoracoscopic surgery (VATS) has been applied to pulmonary resection for pulmonary metastases, the clinical validity of this approach remains controversial. The purpose of this study was to evaluate the validity and problems of VATS for pulmonary metastasectomy. METHODS: From January 1993 to December 2003, VATS for pulmonary metastasectomy was performed in 53 resections for 48 patients at our institution. The medical records of these patients were retrospectively reviewed. RESULTS: The primary tumor was colorectal cancer in 23 patients, renal cell carcinoma in 6, breast cancer in 6, germ cell tumor in 5, head and neck cancer in 2, and others in 6. Thirty-six cases had a solitary lesion, 8 had unilateral multiple lesions, and 9 had bilateral multiple lesions. The following procedures were performed: 7 lobectomies, 5 segmentectomies, and 41 wedge resections. There was no major postoperative morbidity related to VATS. At a median follow-up period of 29.0 months, 13 patients were alive without recurrences. The 3-year overall survival rate and the 3-year intrathoracic disease-free survival rate were 59.8% and 33.4%, respectively. Five cases had recurrence at the surgical stump or at the port sites, but these recurrences have not been found in the recent period since June 1997. Intrathoracic recurrences within 3 months after VATS occurred in four. CONCLUSION: VATS for pulmonary metastases is not superior to the conventional open thoracotomy and is not recommended as a standard procedure. Further studies with a larger number of cases performed by skilled surgeons familiar with VATS are needed.