Prospective data collection and evaluation of complete data sets will be performed in the course of routine clinical care of a cohort of consecutive patients (children up to 16 years old) presenting with an isolated femur shaft fracture. Data will be collected during follow-up visits at 3 to 6 weeks, 3, 6, 12 and 24 months, with additional follow-up visits as needed or dictated by individual practice. Final follow-up will be at 24 months, unless a patient requires additional follow-up or another intervention to address an unfavorable outcome (e.g. malalignment, nonunion, limb length discrepancy) noted at the 24 month follow-up visit.