THORACIC OUTLET SYNDROME - SCALENE TRIANGLE: ADSON TEST The Adson test seems to be the most accurate test for TOS with a sensitivity of 79% and a specificity of 79% according to a review done by Gillet et al. (2001): You can find the link to this study about the accuracy of different TOS tests under following link: https://www.ncbi.nlm.nih.gov/pubmed/11707008 I am a bit unsure though if it makes a lot of sense to do an accuracy study for TOS, because the brachial plexus can get entrapped in 3 di