“…Moreover, conducting an imaging workup is useful for ruling out other pathologies that can mimic the symptoms, including primitive and secondary tumours, paraneoplastic immunomediated syndromes, bony and soft tissue thoracic outlet syndromes and joint shoulder disease. MRI is the technique of choice in patients with shoulder pain and weakness (17,18). In our small series, MRI was able to exclude compressive aetiologies in the plexus and support the clinical and neurophysiological findings of idiopathic plexopathy by demonstrating the occurrence of discrete acute inflammatory changes in the brachial plexus structures in seven of the eight patients (#1, 2, 3, 4, 6, 7 and 8).…”