Teenage Boy With a Painful Forearm

A 10-year-old boy presented to the emergency department following an accidental fall from a tree from a height of approximately 2 m, causing him to land on his left forearm. On physical examination, localized tenderness and swelling were noted in the left forearm with no evidence of open wounds. Other aspects of the physical examination revealed unremarkable findings. A point-of-care ultrasound of his forearm was performed (Figure 1 and Video E1, available at http://www.annemergmed.com), and the standard radiographic projection (Figure 2) confirmed the diagnosis.