Although several studies have studied the predictive nature of non-accidental trauma of the different types of fractures and in particular on the femur, the physiological and radiological particularities of the child make it difficult to estimate the age of a fracture and require defining a chronology specific to the specificities of the pediatric population. Some authors have carried out work for the dating of fractures, however the number of cases or the average age of the subjects does not allow a precise estimation of the chronology of evolution of the fractures.

Inclusion criteria:

• Child aged 18, cared for in the pediatric orthopedic department of the Strasbourg University Hospitals between January 2007 and December 2020
• Fracture of the femur resulting from orthopedic treatment instituted during a period of hospitalization
• Holders of parental authority who have been informed of the use of their child's data for the purposes of this research and who have not expressed any opposition

Exclusion criteria:

• Patient or legal representative who expressed their opposition to participating in the study
• Fracture of the femur having benefited from a surgical intervention
• Weakening metabolic or bone pathology
• Fracture on pathological focal lesion
• Fractures of the epiphysis or affecting the growth cartilage
• Impossibility of giving informed information to the subject

Child aged 18, cared for in the pediatric orthopedic department of the Strasbourg University Hospitals between January 2007 and December 2020