Figure 27.

Neurolymphomatosis (diffuse large B-cell lymphoma). Coronal oblique T2 (A), coronal oblique T1 (B), coronal oblique T1 post-contrast with fat saturation (C) and axial oblique T1W sequences (D,E) demonstrate 2 masses (arrows) at the level of the divisions and cords of the left brachial plexus, which are isointense to muscle in T1, show minimal increased T2 signal as well as post-contrast enhancement. In addition, there is thickening and post-Gadolinium enhancement of the roots and trunks consistent with diffuse involvement of the plexus.