Ulnar Neuropathy With Normal Electrodiagnosis and Abnormal Nerve Ultrasound

Abstract

Yoon JS, Walker FO, Cartwright MS. Ulnar neuropathy with normal electrodiagnosis and abnormal nerve ultrasound. Arch Phys Med Rehabil 2010;91:318-20. Ulnar neuropathy at the elbow (UNE) is the second most common entrapment neuropathy. It is diagnosed with electrodiagnostic studies, but they can yield false-negative results. Ultrasound was used to examine 4 patients with UNE and negative electrodiagnostic findings, and it showed ulnar nerve enlargement near the elbow in all cases, with a mean cross-sectional area of 20.1mm(2). This indicates that ultrasound may be a useful tool for assessing those with UNE symptoms and normal electrodiagnostic findings.