A 7-year-old man is brought to the emergency department due to left arm pain after a fall. He was playing outside when he fell on his outstretched left arm. On examination, there is swelling of the left elbow with tenderness on the distal side of the humerus. The radial pulse is felt full bilaterally. Radiological imaging shows supracondylar fracture of the humerus, along with anterolateral displacement of the proximal part of the humerus. Which of the following structures is most likely injured in this patient?

Question

Quizplus · Accepted Answer

Eductional Objective: Hyperextension of the elbow due to a fall on an outstretched arm leads to supracondylar fracture. Anterolarerally to the humerus runs the radial nerve, and therefore anterolateral displacement of the humerus tends to injure the radial nerve. Anteromedially, the brachial artery runs on the humerus.

A 7-Year-Old Man Is Brought to the Emergency Department Due