During a 20-year period from 1974 to 1994, 37 thoracic outlet decompressions were performed. There were 28 females and six males (ratio 5:1). The median age was 37 years (range 15-64). Symptoms were predominantly neurological in 29 limbs (78%), arterial in five limbs (14%) and venous in three limbs (8%). Limb pain and paraesthesia were the most common symptoms. Surgical decompression was performed via a supraclavicular approach in 24 limbs (65%) and a transaxillary approach in 13 limbs (35%). A cervical rib was excised in 21 limbs (57%), a first rib in 10 limbs (27%), a cervical and first rib in one limb (3%) and a cervical band in five limbs (13%). Arterial reconstruction was only required in three limbs (8%). There were a total of four complications (11%). The outcome of surgical decompression was assessed by using a questionnaire completed by the patient. Overall 27 patients (87%) felt that the operation was worthwhile. These results show that surgical decompression for thoracic outlet syndrome is a worthwhile procedure and is associated with relatively few complications.