Fig. 4

Case 3: 8-year-old female. a–d Spherical mass in the upper trunk of the right brachial plexus from different angles, closely related to the right brachial plexus, and the right cervical VIII nerve is compressed and uplifted. e, f right subclavian artery passes through the front of the mass, and the boundary between the mass and the right subclavian artery is clear. The pathological results in g and h show a schwannoma