A 2 ½ -year-old boy is seen in the clinic with a 1-day histo…
A 2 ½ -year-old boy is seen in the clinic with a 1-day history of refusing to use his left arm. The mother states the child ran after a ball that was rolling into the street and the mother grabbed the child’s left forearm and pulled him away from the street. The child is holding his left arm close to his body with the elbow in a flexed position. On physical examination, the child has no bony tenderness, erythema, or swelling of the joints but on passive motion, the child resists and cries in pain. What is the diagnosis for this child?