“…Indeed, athletes combine nonspecific factors (such as cervical rib or coagulation anomaly) and more specific factors such as muscle hypertrophy, especially of the pectoralis minor, inducing the compression of the adjacent neurovascular bundle. This hypothesis is sustained by the frequent observation of muscle hypertrophy during TOS surgical procedure ( Katirji and Hardy, 1995 ; Ozcakar et al, 2005 ; Simovitch et al, 2006 ; Almeida et al, 2007 ; Aydoğ et al, 2007 ; Baltopoulos et al, 2008 ; Fitzgerald, 2012 ; Herbst and Miller, 2013 ; Jourdain et al, 2016 ; Norinsky et al, 2016 ; Ciampi et al, 2017 ). Bottros et al (2017) also proposed a diagnostic test of N-TOS based on ultra-sound guided scalenus anticus anesthesia.…”