Brachial plexus neuropathy occurs when certain pathological changes affect the brachial plexus, causing clinical symptoms such as pain, numbness, and weakness. The brachial plexus is composed of four nerves from cervical vertebrae 6 to 7, 8, and thoracic vertebra 1. The brachial plexus gives rise to the median nerve, ulnar nerve, and radial nerve, making it a central hub. If the brachial plexus is injured, for instance, through trauma such as stretching, tearing, tumor compression, or bone impingement, this can lead to clinical manifestations including pain, numbness, and weakness in the arms and hands, a condition known as brachial plexus neuropathy. If such symptoms occur, it is crucial to promptly complete the necessary examinations to clarify the changes in the condition.