Slipped Capital Femoral Epiphysis (SCFE) is the most common disorder of the adolescent hip and diagnosis and treatment of SCFE remain areas of controversy and investigation. The current issues relating to diagnosis stem from an inability to diagnose the condition early on, resulting in increased morbidity. Once diagnosed, there are multiple different options for surgical treatment, including in-situ pinning, and the Modified Dunn procedure. Research is ongoing to determine the parameters that should be considered when selecting a procedure to ensure an ideal outcome. In particular, there is a focus on investigating which treatment method may result in lower incidence of avascular necrosis of the femoral head and femoroacetabular impingement (FAI), two significant long term concerns associated with SCFE. Despite myriad published studies on SCFE, very few are prospective and most lack sufficient patient numbers for clinically meaningful comparative analysis. The aim of this study is to develop a multi-center, international prospective registry of patients with SCFE to facilitate the comprehensive examination of clinical, functional and radiographic outcomes of each treatment, in relation to specific parameters determined prior to intervention. The general registry will serve as a hypothesis-generating database of prospectively collected outcomes. In turn, this will facilitate the development of targeted, hypothesis-testing randomized controlled trials and observational studies that can be housed within the larger registry.

Inclusion Criteria:

• Confirmed diagnosis of SCFE
• Intend to receiving follow-up at participating centre
• Less than 18 years old at time of admission
• Adequate diagnostic information and radiographic imaging (for patients previously treated for SCFE)

Exclusion Criteria:

• No definitive diagnosis of SCFE
• Do not intend to receive follow-up at a participating centre
• Greater than 18 years old at time of admission
• Prior treatment for SCFE not appropriately documented
• Known or suspected underlying conditions (e.g., cerebral palsy, spina bifida, or osteogenesis imperfecta)

Patients who have been diagnosed with SCFE and receive follow-up at a participating centre will be included in the registry. Patients will be enrolled during one of their routine clinic appointments at one of the participating centers.