Fig. 6. 66-year-old female with diffuse and large B-cell lymphoma involving brachial plexus.

Coronal fat-suppressed (FS) T2-weighted image (T2WI) (A), axial T2WI (B), and contrast-enhanced (CE) FS T1-weighted image (C) demonstrating ill-defined infiltrating mass (arrows on A-C) involving left C5 and C6 nerve roots and upper trunk that displaces left middle trunk (double arrows on A) inferiorly. Note denervation changes with T2 hyperintensity and homogeneous enhancement of subscapularis (asterisk on B and C), supraspinatus (empty arrows on B and C), and pectoralis major (dotted arrow on C) muscles.