A 4-year-old girl is brought to the emergency department due to an inability to move her left arm. She was playing with her sibling and pulled her from her hand. She started crying after this incident and refused to move her hand. Physical examination shows her left arm held flexed with a pronated forearm. The patient has pain with any movement of the elbow. No swelling or deformity is noticed. This patient's presentation is due to an abnormality affecting which of the following structures?

Question

Quizplus · Accepted Answer

Eductional Objective: Sudden traction on the axial plane of the arm of the child leads to radial head subluxation. Radial head subluxation displaces the annular ligament in the radiohumeral joint. Patients present with no deformity, with the hand, held flexed and forearm pronated.

A 4-Year-Old Girl Is Brought to the Emergency Department Due