PMC4754593_01
Ultrasonographic findings, revealing (A) the anconeus epitrochlearis muscle (arrowhead) in close proximity to a swollen ulnar nerve (arrow), and (B) a hypoechoic ganglion cyst (G) and ulnar nerve (circle) between the hamate hook (HAM) and pisiform.
jkns-59-75-g001.jpg
PMC4754593_01_jkns-59-75-g001.jpg
F1
Electrophysiologic findings were consistent with an ulnar nerve lesion around the elbow; however, ultrasonographic findings showed that the anconeus epitrochlearis muscle lay between the medial epicondyle and olecranon in a close proximity with a swollen ulnar nerve around the elbow (Fig. 1A), and that a hypoechoic ganglion cyst had displaced the ulnar artery and compressed the ulnar nerve around the wrist (Fig. 1B).
Operative findings, showing (A) the anconeus epitrochlearis muscle (arrowhead) compressing the ulnar nerve (arrow), and (B) a ganglion (arrowhead) compressing the ulnar nerve (arrow).
jkns-59-75-g002.jpg
PMC4754593_01_jkns-59-75-g002.jpg
F2
During surgery, the anconeus epitrochlearis muscle (Fig. 2A), extending from the medial epicondyle to the olecranon, was found to be compressing the ulnar nerve at the elbow level. There was a 2.5x2.0-cm, welldefined, encapsulated, cystic mass compressing the motor branch of the ulnar nerve at the wrist (Fig. 2B).