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  Indian J Med Microbiol
 

Figure 1 (a) Image showing neuromuscular ultrasound assessment of patients with left thoracic outlet syndrome; the left arm was abducted more than 120 with impingement of neurovascular bundle ‘pectoral bowing ratio’ (line B-B) under the pectoralis minor muscle (PMM) posterior edge (line A-A) with (B-B)/(A-A) exceeding 15%. (b) Normal right side of the same patient was assessed during arm abduction more than 120 with no significant impingement and the same ratio was not exceeding 10%.

Figure 1 (a) Image showing neuromuscular ultrasound assessment of patients with left thoracic outlet syndrome; the left arm was abducted more than 120 with impingement of neurovascular bundle ‘pectoral bowing ratio’ (line B-B) under the pectoralis minor muscle (PMM) posterior edge (line A-A) with (B-B)/(A-A) exceeding 15%. (b) Normal right side of the same patient was assessed during arm abduction more than 120 with no significant impingement and the same ratio was not exceeding 10%.