7T MR neurography-ultrasound fusion for peripheral nerve imaging.

Background: We present one patient with an initial diagnosis of Guillain-Barré syndrome (GBS) and one with Charcot-Marie-Tooth disease (CMT) type 1A.

Methods: Both patients underwent ankle tibial nerve fusion-imaging of high-resolution ultrasound (HRUS) with 7T MR neurography (MRN).

Results: In GBS, the nerve was enlarged, T2-hyperintense, and showed increased vascularization 21 months after symptom onset.