Do not forget the brachial plexus-prevalence of distal brachial plexus pathology on routine shoulder MRI.

• Normal T2 signal of the brachial plexus is iso- to slightly hyperintense to muscle but less signal intense than fluid. • Diffuse, geographic muscle edema is an indirect sign of brachial plexus pathology. • Increased T2-weighted nerve signal with or without caliber or course change should be reported and followed up to find the underlying etiology.