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We sent our members questionnaire asking about their activities. From December 1992 to the end of 2000, endoscopic thoracic sympathicotomy (ETS) was utilized in 7,017 cases in 50 hospitals and institutes. Of which 6,776 (96.6%) were performed on hypersweating. There have been no deaths related to ETS either during the hospital stay or following discharge. Intraoperative bleeding was reported in 28 cases (0.3%) and an open chest procedure to stop bleeding was required in 6 cases (0.08%). Short term Horner's syndrome after the operation was found in a few cases, however, permanent symptoms were recognized in only 18 (0.28%). The most common postoperative complaint was compensatory sweating on the chest, back, or abdomen. Most of these patients countered this condition by using several methods of prevention or protection and continued on their daily life with little restriction. However, 83 cases (1.2%) experienced severe compensatory sweating and consulted their doctors repeatedly for more than one year. All operators who perform ETS recognized the excellent results for hand and facial sweating. Further, many doctors prefer this procedure as a first treatment for vascular disorders in upper extremities.