A 2-year-old girl is brought to the physician by her father after she suddenly stopped using her right arm. He reports that while walking together earlier that day, he lifted her by the hand to help her over a curb, after which she cried briefly and has refused to move the arm since. On examination, the child holds her right arm close to her body with the elbow slightly flexed and the forearm pronated. There is no swelling, bruising, or deformity, but she resists any attempted movement at the elbow. Which of the following is the most likely explanation for these findings?
A) Distal shaft fracture
B) Greenstick fracture
C) Medial epicondylar fracture
D) Subluxation of radial head
E) Supracondylar fracture of humerus
