[Neurinoma arising from brachial plexus with intrathoracic extension resected through the second intercostal space].

A case of neurinoma arising from the right brachial plexus with intrathoracic extension was reported. The patient was a 41-year-old man who had an abnormal shadow in the right apical area on the routine chest X-ray examination. Magnetic resonance imaging (MRI) revealed that the mass had some features of benign neurinoma. The tumor was resected through the 2nd intercostal space under an axillary skin incision approach and diagnosed as neurinoma on histological examination. He had a complaint of hyperesthesia of the right upper arm for 2 months postoperatively.