Slipped capital femoproximal femoral epiphyseal growth plate. The name of the condition is a misnomer because the metaphysis, not the epiphysis, is displaced. It most commonly occurs in adolescent boys. The etiology is not fully understood, but risk factors include obesity and endocrine disorders. SCFE may have an acute or insidious onset and manifests with hip pain, limping, and restricted movement of the affected hip. If the patient is unable to walk, then the SCFE is considered unstable, which increases the risk of complications such as avascular necrosis. Conventional x-ray confirms the displacement. Surgical fixation is the only treatment option.iphysis (SCFE) refers to the superior and anterolateral displacement of the femoral neck due to weakening of the
The exact etiology is still unknown. However, there are some risk factors that increase the likelihood of SCFE: 
- Puberty-induced hormonal changes, endocrine disorders, inflammation → poor cartilaginous organization and maturation → wide and unstable proximal femoral epiphyseal growth plate 
- Obesity, growth spurts, trauma → increased shear force
- Shear force > strength of the epiphyseal growth plate → superior and anterolateral displacement of the metaphysis distal to the growth plate
- Chronic (3 weeks to several months)
- Acute on chronic (chronic with acute exacerbations)
- Location: bilateral in 20–40% of cases 
- Dull pain in the medial thigh, knee , groin, or hip (often left > right)
- Restricted range of motion
- Stability of the physis
- Widening of the joint space
- The femoral head appears to be displaced posteriorly and inferiorly relative to the femoral neck.
- Klein line not passing the femoral head: It is a straight line drawn along the superior border of the femoral neck that normally passes through the femoral head.
- Frog leg projection line not passing the femoral head: It is a line drawn through the center of the epiphysis that normally should pass through the center of the femoral neck.
- Southwick method (for measurement of the slip angle/severity): refers to the tilt of the femoral neck in relation to the femoral head
- Rules out underlying medical conditions (e.g., rickets)
- Determines degree of displacement
- Laboratory tests: to exclude endocrinopathies in patients with an atypical age of onset or short stature
To visualize the displacement of the femoral head relative to the femoral neck as seen on x-ray, imagine a scoop of ice cream slipping from its cone.
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Snapping hip syndrome 
- Definition: : snapping of the iliotibial band or gluteus maximus over the greater trochanter (external), or snapping of the iliopsoas tendon over the iliopectineal eminence (internal), typically seen in young athletes and dancers
- Clinical features
The differential diagnoses listed here are not exhaustive.