Figure 5. Ultrasound image of the elbow that demonstrates thickening and hypoechogenicity of the posterior interosseous nerve in the region of the “Arcade of Fröhse” (arrow)

From

Posterior Interosseous Nerve Compression Syndrome: Imaging Findings Highlights

Jose Elmadan Albuquerque Barroso-Junior, Jovelino Coimbra-Neto, Francisco Abaete Chagas-Neto

American Journal of Medical Case Reports. 2015, 3(12), 415-418 doi:10.12691/ajmcr-3-12-9