A previously healthy 11-year-old boy presented to the emergency department with a history of left forearm pain. He described a 3-month history of intermittent mild left forearm pain, which worsened after activity. On physical exam, he presented swelling of the distal third of the left forearm, without signs of inflammation or infection. Figs. 1, 2 and 3.
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Guimaraes, J.B., Masson, R., Petrilli, M. et al. Painful left forearm swelling. Skeletal Radiol 50, 431–432 (2021). https://doi.org/10.1007/s00256-020-03590-x