Fig. 1.

Ultrasonography at the antecubital level. (A) Left, injured arm; it shows the soft tissue swelling and prominent echogenicity around the lateral antebrachial cutaneous nerve (asterisks), adjacent to the cephalic vein (V), implying either direct nerve injury or compressive neuritis due to the surrounding hematoma. A hyoechoic linear line indicated with ‘▲’ symbol shows the trajectory of the needle coming out. (B) A contralateral, right, uninjured arm; it shows the lateral antebrachial cutaneous nerve (asterisk) with normal sono-archtitecture. (C) Follow-up ultrasonographic image of the first case done at three weeks after the injury, showing improvement in the segmental swelling and perineural echogenic changes around the affected nerve (asterisks).