Schertz M, et al. – This study was sought to evaluate and compare the relevance of morphological and dynamic variants of the ulnar nerve (UN) and its surrounding structures (UN abnormalities) in symptomatic and asymptomatic patients using high–resolution ultrasound. It was noted that the two–fold higher frequency of occurrence of UN abnormalities in arms with UNE indicates their causative or at least contributory role in such neuropathies. Remarkably, high–resolution ultrasound should be part of the initial assessment of UNE in order to assess the etiology of the conflict.