Fig. 3

Case 2: 59-year-old female. a, b Spindle mass in the upper trunk of the right brachial plexus, closely related to the middle trunk, with the upper trunk and lower trunk surrounding the mass. c, d Right subclavian artery passes under the mass, and the boundary between the mass and the right subclavian artery is clear. The pathological results in e and f show a schwannoma