Persistent Radial Neuropathy: Deep Branch Thickening and Hyperintensity

In persistent radial neuropathy after neurolysis, the deep branch of the radial nerve shows severe thickening and hyperintensity as it enters the supinator muscle, while the superficial branch remains normal—a key imaging distinction.

• This short educational video by Dr. Christoph Agten demonstrates how to assess post-neurolysis radial neuropathy by identifying isolated deep branch involvement at the supinator (arcade of Frohse), helping avoid misdiagnosis.
• A single-case visual teaching pearl; no quantitative data or systematic evaluation is provided, but it highlights a critical imaging pitfall for trainees and practicing radiologists.

RadPigeon summaries are original and for information only. They are not clinical advice.