Comparison between the right side and subxiphoid bilateral approaches in performing video-assisted thoracoscopic extended thymectomy for myasthenia gravis

Background: This study aimed to compare the efficacy of the right thoracoscopic (RtT) approach and the subxiphoid bilateral thoracoscopic (SxBiT) approach in performing thymectomy for myasthenia gravis. Methods: Between March 2001 and April 2003, 27 myasthenic patients were enrolled in this prospective study. The operations were conducted by two surgical teams in a single institute. The surgical procedures included RtT for 12 patients and SxBiT for 15 patients. The operation time, resected thymus weights, and thoracic drainage periods were compared. Results: Subxiphoid video-assisted thoracoscopic extended thymectomy (SxVATET) and right-side thoracoscopic extended thymectomy (RtVATET) were performed for 27 consecutive myasthenic patients. The mean operation time, weights of resected specimens, and duration of hospital stay for the SxVATET and RtVATET groups were, respectively, 151.3 min (range, 120-200 min) versus 191.5 min (range, 120-225 min) (p=0.0012), 73.3 g (range, 40-90 g) versus 50.8 g (range, 5-90 g) (p=0.0029), and 3.1 days (range, 2-4 days) versus 3.8 days (range, 2-4 days) (p=0.914). Ten patients (37%) had complete remission, observed during a mean follow-up period of 18.5 months (range, 6-30 months). Conclusions: During this consecutive experience, both the RtT and SxBiT approaches showed satisfactory results for nonthymomatous myasthenic patients. However, a better view of the bilateral pleural cavities and more radical thymectomy could be achieved only by the SxBiT approach.