A 71-year-old woman presented with a dislocated proximal humeral fracture. Arterial bleeding had occurred during the open reduction of her dislocated humeral head. A tissue-like vessel was ligated and separated to stop bleeding; however, arterial bleeding continued. As the bleeding source was a ruptured axillary artery diagnosed by the emergent angiography, it was considered impossible to embolize. Therefore, the injured part of axillary artery was exposed and clipped. The former ligated tissue was confirmed as a nerve after enable hemostasis, and it was sutured. We diagnosed iatrogenic musculocutaneous nerve injury, because she could not flex her elbow and recognize sensation of the lateral part of her forearm after the operation. Three and a half years later, her elbow had good motor function (MMT of elbow flexion 5) , and the sensation of her forearm had recovered to normal. We performed electrophysiological examination, which targeted sutured musculocutaneous nerves. Our case demonstrates good outcome of motor function of the biceps and sensation of the lateral forearm cutaneous nerve after nerve repair in an elderly patient.
