case_images: PMC4754593_01
case_images: 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.
case_images: jkns-59-75-g001.jpg
case_images: PMC4754593_01_jkns-59-75-g001.jpg
case_images: F1
case_images: 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).
case_images: Operative findings, showing (A) the anconeus epitrochlearis muscle (arrowhead) compressing the ulnar nerve (arrow), and (B) a ganglion (arrowhead) compressing the ulnar nerve (arrow).
case_images: jkns-59-75-g002.jpg
case_images: PMC4754593_01_jkns-59-75-g002.jpg
case_images: F2
case_images: 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).