Slipped capital femoral epiphysis (SCFE), is a hip condition that occurs in growing children and teenagers. The “epiphysis” is the ball at the top of the thigh bone (femur) and it sits on a growth plate. In SCFE, that growth plate becomes weak and the ball gradually (or sometimes suddenly) shifts out of alignment relative to the neck of the femur. A helpful way to picture it is ice cream slipping off a cone: the ball stays in the socket, but the rest of the thigh bone moves, making the ball and neck no longer line up properly.
SCFE is considered an orthopaedic emergency because continued slipping can damage the blood supply to the femoral head and permanently change hip shape. That can lead to complications like avascular necrosis (bone tissue damage due to reduced blood flow), early hip arthritis, or hip impingement (the misshapen bone bumps during movement and irritates the joint). The main medical treatment is surgical stabilisation, usually with a screw to stop further slip.
Key Facts
- In a cohort study of children presenting with unilateral SCFE (without prophylactic pinning), 18% developed a subsequent contralateral SCFE. 🔗
- A published post-operative protocol for SCFE treated with percutaneous pinning describes return to play with medical clearance at approximately 3 to 4 months. 🔗
- Reported population prevalence varies widely, from about 0.71 to 10.8 cases per 100,000 children. 🔗
Risk Factors
- Higher body weight or rapid weight gain during adolescence
- Growth spurts and puberty-related changes in bone
- Family history of SCFE
- Endocrine or metabolic conditions (for example thyroid disorders, growth hormone issues)
- Renal osteodystrophy or other conditions affecting bone quality
- Male sex is more commonly affected in many populations
- Previous SCFE on the other side (risk of bilateral involvement)
Symptoms
- Limping, often worsening over weeks (sometimes sudden onset after a minor twist or fall)
- Hip or groin pain, or pain felt in the thigh
- Knee pain with no obvious knee injury
- Stiffness and reduced hip movement, especially difficulty turning the leg inward
- The leg “turns out” when walking, standing, or when the hip is bent
- Reduced tolerance to sport, running, stairs, or prolonged walking
- In more severe cases, inability to bear weight on the leg
Aggravating Factors
- Walking longer distances, running, or sport training
- Squatting, sitting low, or getting in and out of a car
- Stairs or hills
- Turning or pivoting on the affected leg
Causes
SCFE happens when the growth plate at the top of the femur cannot cope with the forces going through it. During adolescence, the growth plate is naturally a weaker area compared with mature bone. If the load is higher than the growth plate can tolerate, the epiphysis can shift relative to the femoral neck.
Loads can increase due to body weight, rapid growth, changes in coordination during puberty, and sporting demands. Some children have additional biological risk factors that weaken the growth plate further, such as endocrine or metabolic conditions.
From a physiotherapy perspective, it is useful to think of SCFE as a condition where the hip’s “structural tolerance” is reduced at a critical time in development. That is why early detection matters, and why physiotherapists treat a new adolescent limp or persistent knee pain as a hip problem until proven otherwise.
How Is It Diagnosed?
Diagnosis is based on the clinical story, physical examination, and imaging. A common pattern is an adolescent with a limp plus poorly localised pain (hip, thigh, or knee). On assessment, clinicians often find reduced hip internal rotation and a tendency for the hip to externally rotate when it bends.
Physiotherapists are often involved early because families may first seek help for “knee pain”, a limp, or reduced sport performance. In suspected SCFE, the safest approach is to stop sport and minimise weight-bearing until urgent medical review and imaging are organised.
Investigations & Imaging
- X-ray
- (pelvis anteroposterior view) Confirms SCFE and helps assess alignment, including signs like widening/irregularity of the growth plate. (frog-leg lateral view) Often improves detection and shows the amount and direction of slip more clearly than the anteroposterior view. (both hips) Checks for bilateral involvement or early changes on the other side, which can influence orthopaedic planning.
- Magnetic resonance imaging (MRI)
- Can detect “pre-slip” changes and early stress/inflammation at the growth plate if X-rays are inconclusive, and can help assess complications.
- Blood tests (endocrine and metabolic screening, if indicated)
- Considered when presentation is atypical (very young age, low body weight, or other red flags) to look for underlying contributors that may affect both hips.
Grading / Classification
- Stable vs unstable (Loder classification)
- Stable: the child can still bear weight (with or without crutches). Unstable: the child cannot bear weight even with crutches; higher complication risk.
- Acute, chronic, or acute-on-chronic (based on symptom duration)
- Acute: symptoms less than 3 weeks. Chronic: symptoms 3 weeks or longer. Acute-on-chronic: a long-standing ache/limp with a sudden worsening.
- Severity by slip angle (commonly Southwick method)
- Mild, moderate, severe categories based on the difference in angles between the affected and unaffected side on lateral imaging, guiding surgical planning and prognosis discussions.
Physiotherapy Management
Physiotherapy for slipped capital femoral epiphysis is usually delivered in partnership with an orthopaedic surgeon and is guided by surgical instructions (especially weight-bearing status). SCFE physiotherapy exercises and SCFE rehab progressions must respect healing timeframes and the risks of further slip, hip impingement, or complications. The physiotherapist’s priorities typically include restoring safe walking, rebuilding hip and lower-limb strength, improving hip movement within safe limits, retraining functional tasks (stairs, school day activity, sport drills), and helping families understand how to pace activity.
Exercise
Early SCFE rehab often starts with gentle, protected range of motion and low-load activation, then builds toward strength, balance, and sport-specific capacity. After fixation, many children develop weakness in the hip abductors and external rotators (the muscles that stabilise the pelvis and control knee and hip position). A physiotherapist will often begin with supported hip and knee movements (as allowed), then progress to closed-chain strength such as sit-to-stand practice, step-ups, and controlled squats once weight-bearing restrictions lift. “Slipped capital femoral epiphysis physiotherapy exercises” usually focus on hip and trunk control to reduce compensations like an out-turned foot and a lurching gait. As capacity improves, rehab shifts to endurance and power appropriate for the child’s sport and growth stage, with careful attention to hip mechanics so the reshaped joint is not repeatedly forced into painful impingement positions.
Activity Modification
Before diagnosis and surgery, activity modification is urgent: stop sport and running, reduce walking, and use crutches if advised, because continued loading can worsen the slip. After surgery, activity modification becomes a pacing plan. A physiotherapist helps families balance healing with the child’s need to move: short, frequent bouts of walking (within weight-bearing rules), avoiding deep hip flexion and twisting early on, and managing school activities like stairs, carrying a bag, and sitting tolerance. This is a major part of SCFE rehab because a child may feel “fine” before tissues are ready for full sport.
Manual Therapy
Manual therapy is not a primary treatment for SCFE itself, because the issue is at the growth plate and alignment is surgical. However, physiotherapists may use gentle, symptom-guided soft tissue techniques to address secondary muscle guarding around the hip, thigh, or lower back, particularly when pain has altered walking for weeks. Any hands-on approach must be cautious and never attempt to force hip range, especially into internal rotation or deep flexion if that reproduces pinching pain.
Education
Education is central to physiotherapy for slipped capital femoral epiphysis. Physiotherapists explain why the hip may refer pain to the knee, why a limp matters, and why “pushing through” pain is risky during recovery. Families also need practical coaching: safe crutch use, how to follow weight-bearing instructions, what symptoms should trigger urgent review (increasing pain, reduced ability to weight-bear, fever, wound concerns), and how to progress activity without large spikes. Education also includes setting expectations: strength and gait changes are common for a period after surgery, and a graded return to sport reduces the chance of flare-ups, compensatory injuries, and confidence loss.
Other
Gait retraining is a major component of SCFE physiotherapy. After weeks of pain, many children adopt an altered walking pattern that can persist even once the hip is stabilised. Physiotherapists cue step length, pelvic control, trunk alignment, and foot position, then build walking tolerance gradually. Where appropriate, physiotherapists also screen for whole-limb issues that can develop secondary to the limp, such as knee pain from altered biomechanics or calf weakness from reduced activity.
Other Treatments
Non-surgical treatment is not considered a safe standalone option for confirmed SCFE because the priority is to prevent further slip. Pain relief may be used as advised by the treating team, but it should not be relied on to “test” whether symptoms settle. If an endocrine or metabolic condition is identified, medical management of that condition can be important for overall bone health and for reducing risk to the other hip.
In selected cases, surgeons may discuss prophylactic fixation of the contralateral hip, particularly when the child is at high risk of developing a slip on the other side. Physiotherapists then adapt rehab to the fact that both hips may have been operated on, which can temporarily affect mobility and strength more than a single-sided procedure.
Surgery
Surgery is the standard treatment to stop further slipping. The most common operation for many slips is in situ fixation, where one (sometimes two) screws are placed to stabilise the femoral head relative to the neck without trying to “force” the bones back into perfect alignment. The goals are to prevent progression, protect blood supply, and reduce the risk of long-term joint damage.
More complex procedures may be considered for severe deformity, unstable slips, or when hip shape is likely to cause significant impingement. Surgical decision-making is specialised and considers stability (stable vs unstable), severity, symptom duration, and surgeon expertise. Physiotherapists support surgery by preparing the child for crutches and post-operative mobility, then guiding staged rehabilitation according to the surgeon’s restrictions and healing milestones.
Prognosis & Return to Activity
Prognosis depends strongly on how early the condition is diagnosed, whether the slip is stable or unstable, and whether complications occur. Many children do very well after fixation, particularly when the slip is stable and treated promptly. Physiotherapy can improve functional outcomes by restoring hip strength and movement control, reducing persistent limping, and rebuilding conditioning for sport and school life.
Return to activity is staged. Early phases focus on protected walking and basic function. Mid phases rebuild strength, balance, and gait quality. Later phases reintroduce running, change-of-direction, and sport-specific drills when cleared medically. A physiotherapist will often use functional criteria (pain response, single-leg control, walking and stair endurance, hopping progressions where appropriate) to guide readiness, rather than relying on time alone.
Some children may notice persistent hip stiffness or pinching with deep hip flexion due to residual bony shape changes. Physiotherapy management then focuses on improving hip and trunk control, modifying aggravating positions, and building strength so the hip is less irritated during sport.
Complications
- Avascular necrosis of the femoral head (loss of blood supply leading to bone damage)
- Chondrolysis (cartilage damage leading to rapid stiffness and joint narrowing)
- Femoroacetabular impingement from altered hip shape, causing groin pain and restricted movement
- Early hip osteoarthritis later in life, particularly after severe slips or delayed diagnosis
- Ongoing limp, muscle weakness, or reduced sport tolerance without appropriate SCFE rehab
- Contralateral SCFE developing weeks to months after the first slip
Preventing Recurrence
- If your child has had SCFE, follow the surgeon’s and physiotherapist’s return-to-sport plan closely to avoid large spikes in running, jumping, or twisting loads while the hip is still adapting after fixation.
- Maintain hip and trunk strength long-term, especially hip abductors and external rotators, to reduce compensatory limping patterns that can overload the knee and the other hip during growth.
- Avoid repeated deep squat positions, forced hip internal rotation stretches, or aggressive “hip opening” drills if they trigger hip pinching, as these can aggravate post-SCFE impingement symptoms.
- Monitor for any new limp, hip ache, thigh pain, or unexplained knee pain, particularly during growth spurts, and seek prompt assessment. Early detection is one of the best ways to reduce the risk of severe deformity and complications.
- If an endocrine or metabolic condition contributed to SCFE, continue medical follow-up as advised, because bone and growth plate health affects ongoing risk, including the contralateral hip.
When to See a Physio
- Your child has a limp lasting more than a few days, even if they only complain of knee pain
- Hip, groin, thigh, or knee pain that worsens with walking, squatting, stairs, or sport, especially in an adolescent
- A sudden increase in pain or the child cannot bear weight (treat as urgent and seek emergency care)
- After SCFE surgery, for a structured slipped capital femoral epiphysis rehab program, gait retraining, and return-to-sport planning
- Ongoing stiffness, hip pinching, or recurrent pain after fixation that is limiting school sport or daily activity