Optimizing the Diagnosis of Neuralgic Amyotrophy With Neuromuscular Ultrasound: A Case Series

ABSTRACT Neuralgic amyotrophy (NA) is a neuromuscular disorder in which there is typically unilateral shoulder pain followed by weakness and sensory abnormalities over the course of days to weeks. The condition is generally unilateral and confined to the upper limbs; however, bilateral involvement, involvement of the diaphragm, and involvement of lower limb musculature and cranial nerves have also been noted. The advent of newer imaging techniques like high‐resolution ultrasonography has revolutionized the diagnostic approach of this disorder, which was previously based on only clinical findings and electrophysiology. Here, we present three cases in which imaging helped solidify the diagnosis of NA. These cases had classic imaging findings of NA, including multifocal nerve enlargement and constrictions. This bedside and accessible diagnostic tool should be considered in all individuals with suspected NA.