SCFE is the most common hip disorder in adolescents (incidence ~10.8 per 100,000), occurring in children aged 8–16 years, and is one of the most commonly missed diagnoses in children. It results from weakening of the proximal femoral physis with posterior-inferior displacement of the epiphysis relative to the metaphysis. Delayed diagnosis increases the risk of avascular necrosis (AVN), femoroacetabular impingement, and lifelong osteoarthritis. [1-2]
1. History
- Classic presentation: Overweight adolescent with dull, aching, poorly localized pain in the hip, groin, thigh, buttock, low back, or knee (knee/distal thigh pain is the presenting symptom in 23% of patients — a major pitfall for missed diagnosis) [1]
- Pain worsens with activity requiring hip flexion: squatting, prolonged sitting, bicycle riding [1]
- Limping is common with significant slippage; may also present as a painless limp [3]
- Onset may be acute (sudden inability to bear weight after minor trauma), chronic (weeks to months of vague pain), or acute-on-chronic [1]
- Ask about duration, weight-bearing ability, and contralateral hip symptoms (bilateral in up to 25–60% of cases) [1][4]
- Important negatives: fever, night pain, weight loss (suggest infection or malignancy), history of trauma
2. Alarm Features
- Inability to bear weight even with crutches → unstable SCFE (AVN rate up to 47–50%) [1][5]
- Sudden onset of severe hip pain after minor trauma in an adolescent
- Bilateral hip symptoms at presentation
- Presentation at extremes of age (<10 or >16 years) → consider underlying endocrinopathy [1]
- Rapidly progressive limp or worsening pain despite rest
- Fever + hip pain → must rule out septic arthritis
3. Medications
- Growth hormone supplementation is an independent risk factor for SCFE [2][6]
- No specific medications treat SCFE — management is surgical
- Avoid forceful manipulation or reduction — this can cause AVN [1]
- Analgesics (acetaminophen, NSAIDs) for pain control while awaiting surgery
- Contraindicated: weight-bearing and physical therapy prior to surgical fixation
4. Diet
- Vitamin D deficiency is an independent risk factor for both SCFE and post-slip osteonecrosis (RR 1.42 for SCFE; OR 5.75 for contralateral slip) [6-7]
- Obesity management is critical for long-term prevention and contralateral slip risk reduction
- No specific acute dietary interventions; long-term weight management counseling is essential
5. Review of Systems
- Musculoskeletal: Hip, groin, thigh, knee pain; limp; difficulty with stairs, squatting, or running
- Endocrine: Symptoms of hypothyroidism (fatigue, cold intolerance, constipation, weight gain), growth hormone deficiency, delayed puberty
- Constitutional: Fever, night sweats, weight loss (to exclude infection/malignancy)
- Contralateral hip: Always ask about bilateral symptoms
- Genitourinary: Testicular/inguinal pathology as referred pain source
6. Collateral History and Family History
- Confirm duration and progression of symptoms from parents/caregivers
- Activity level changes, sports participation, and functional limitations
- Family history of endocrine disorders (hypothyroidism, hypogonadism)
- Family history of SCFE or hip disorders
- Social context: obesity, nutritional status, tobacco exposure (associated with contralateral slip risk, OR 2.43) [7]
7. Risk Factors
- Obesity — the most significant risk factor (RR 3.45) [6][8]
- Male sex (1.5:1 male-to-female ratio) [4]
- Age 8–16 years, during periods of rapid linear growth [4]
- Black, Hispanic, and American Indian/Alaska Native children at higher incidence [3-4]
- Endocrine disorders: hypothyroidism, hypogonadism, panhypopituitarism, renal osteodystrophy [2-3]
- Growth hormone supplementation [2][6]
- Vitamin D deficiency [6-7]
- Diabetes mellitus (OR 1.67 for contralateral slip) [7]
8. Differential Diagnosis
- Septic arthritis — cannot-miss; fever, refusal to bear weight, elevated inflammatory markers
- Transient synovitis — typically younger children (3–8 years), self-limited
- Legg-Calvé-Perthes disease — AVN of femoral head, typically ages 4–10
- Femoral neck stress fracture — activity-related, rare in this age group
- Osteomyelitis — fever, focal bony tenderness, elevated ESR/CRP
- Osteoid osteoma — night pain relieved by NSAIDs
- Malignancy (osteosarcoma, Ewing sarcoma, leukemia) — night pain, constitutional symptoms
- Referred knee pain from hip pathology is a classic SCFE pitfall — always examine the hip when an adolescent presents with knee pain and a normal knee exam [1]
9. Past Medical History
- Prior episodes of hip or knee pain (may indicate chronic slip)
- Known endocrine disorders (hypothyroidism, growth hormone deficiency)
- History of growth hormone therapy
- Previous contralateral SCFE (15.3% develop contralateral slip, mean ~10 months after initial) [7]
- Obesity history and BMI trajectory
- Renal disease (renal osteodystrophy)
10. Physical Exam
- Gait: Antalgic gait, Trendelenburg gait, external foot progression angle, waddling; may be normal in mild cases [1][3]
- Inspection: Leg-length discrepancy, external rotation of the affected leg at rest, gluteal/thigh muscle atrophy [1]
- Range of motion:
- Limited or absent internal rotation — most sensitive finding [1]
- Obligatory external rotation and abduction with passive hip flexion (Drehmann sign) — highly characteristic [1]
- Positive FADIR test (flexion, adduction, internal rotation) reproducing hip/thigh/knee pain (sensitivity ≥59%) [1]
- Palpation: Nonspecific hip musculature tenderness; knee exam typically nontender [1]
- Weight-bearing status: Determines stable vs. unstable classification [1][4]
- Always examine the contralateral hip [1][3]
11. Lab Studies
- No specific labs diagnose SCFE — diagnosis is radiographic
- Labs to rule out dangerous mimics:
- Endocrine workup recommended for patients <10 or >16 years, or height/weight <10th percentile: TSH, free T4, parathyroid hormone, CMP, vitamin D, growth hormone/IGF-1 [1]
- Consider HbA1c if diabetes suspected
12. Imaging
- First-line: Bilateral AP pelvis and frog-leg lateral radiographs (both hips must be imaged) [1-2]
- Stable SCFE: AP pelvis + frog-leg lateral views
- Unstable SCFE: AP pelvis + cross-table lateral (avoid frog-leg positioning due to pain and risk of further displacement) [2][4]
- Key radiographic findings:
- Trethowan sign (Klein's line): A line along the superior femoral neck fails to intersect the femoral head [1]
- Steel sign: Blurring of the proximal metaphysis from overlap of metaphysis and epiphysis [1]
- S sign on frog-leg view: Sharp break along the inferior femur at the physis [1]
- Severity grading: Southwick slip angle on frog-leg lateral (mild <30°, moderate 30–50°, severe >50°) [1]
- MRI: For equivocal radiographs with high clinical suspicion; can detect "pre-slip" physeal edema [3-4]
- Ultrasound and CT are generally not useful for initial diagnosis per AAP guidelines [4]
13. Special Tests
- Drehmann sign: Obligatory external rotation with passive hip flexion — characteristic but not pathognomonic [1]
- FADIR test: Reproduces pain in hip/thigh/knee [1]
- Log roll test: Pain with internal/external rotation of the hip
- Southwick slip angle: Quantifies severity on frog-leg lateral radiograph [1]
- Loder classification: Stable (can bear weight) vs. unstable (cannot bear weight) — the most clinically important classification for prognosis [5]
14. ECG
- Not routinely indicated for SCFE
- Obtain as part of preoperative evaluation per institutional anesthesia protocols
15. Assessment
- SCFE is an orthopedic urgency/emergency — delayed diagnosis leads to increased morbidity [1][4]
- Stable SCFE (can bear weight): Lower complication rate; 96% satisfactory outcomes with in situ fixation [5]
- Unstable SCFE (cannot bear weight): High-risk; AVN rate up to 47–50% [1][5]
- Severity by Southwick angle: mild (<30°), moderate (30–50°), severe (>50°) [1]
- Atypical presentations (isolated knee pain, normal gait) are common and contribute to diagnostic delay — SCFE is one of the most commonly missed diagnoses in children [2]
- Complications: AVN, chondrolysis, femoroacetabular impingement, premature osteoarthritis, leg-length discrepancy [1-2]
16. Treatment Plan
- Immediate: Non-weight-bearing status (crutches or wheelchair) upon diagnosis or suspicion [1]
- Do NOT attempt forceful reduction — risk of AVN [1]
- Urgent orthopedic surgery consultation — ideally surgical fixation within 24 hours [1]
- Stable SCFE: In situ fixation with a single cannulated screw — standard of care with fewest long-term complications [1][9]
- Unstable SCFE: Surgery within 24 hours; options include in situ fixation ± open reduction or modified Dunn procedure; if surgery cannot be performed within 24 hours, delaying beyond 72 hours may paradoxically reduce AVN risk [1]
- Analgesics: Acetaminophen, NSAIDs for pain management
- Endocrine workup for atypical-age patients (<10 or >16 years) or those below the 10th percentile for height/weight [1]
- Contralateral prophylactic pinning is considered in high-risk patients (younger age, endocrine disorders, severe obesity, low vitamin D) [7]
- Postoperative rehabilitation follows a gradual 5-phase protocol; return to sport typically ~6 months [1-2]
17. Disposition
- Admit: Unstable SCFE (unable to bear weight) — requires urgent surgical fixation within 24 hours [1]
- Admit or expedited outpatient surgery: Stable SCFE — recent evidence supports that in situ fixation for stable SCFE can be safely performed in an outpatient setting at high-volume centers with no difference in complication rates, and with significant cost savings [10-11]
- Observation: If awaiting orthopedic consultation, strict non-weight-bearing with bed rest
- Orthopedic surgery consultation: Required for all confirmed or suspected SCFE — this is a surgical condition [1][4]
- Endocrinology referral for patients with atypical age or body habitus [1]
18. Follow Up / Return Precautions
- Postoperative follow-up with orthopedic surgery per surgeon protocol (typically 2 weeks, 6 weeks, 3 months, 6 months, then annually until skeletal maturity)
- Monitor contralateral hip — 15.3% develop contralateral SCFE at a median of ~190 days; risk is highest in younger patients, those with endocrine disorders, severe obesity, and low vitamin D [7]
- Return precautions for families:
- Return immediately for new or worsening hip, groin, thigh, or knee pain on either side
- Inability to bear weight
- New limp or change in gait
- Expected recovery: Gradual return to activity over ~6 months; full weight-bearing typically allowed 6–8 weeks postoperatively per surgeon guidance [1]
- Long-term: Monitor for femoroacetabular impingement symptoms, early osteoarthritis, and leg-length discrepancy [1-2]
- Weight management counseling and vitamin D optimization are important for reducing contralateral slip risk [6-7]
References
1. Slipped Capital Femoral Epiphysis: Rapid Evidence Review. — Webb CW, Liu R, Bouchereau-Lal N. American Family Physician. 2025.
2. Slipped Capital Femoral Epiphysis: Rapid Evidence Review. — Webb CW, Liu R, Bouchereau-Lal N. American Family Physician. 2025.
3. Slipped Capital Femoral Epiphysis: Rapid Evidence Review. — Webb CW, Liu R, Bouchereau-Lal N. American Family Physician. 2025.
4. Slipped Capital Femoral Epiphysis: Diagnosis and Management. — Peck DM, Voss LM, Voss TT. American Family Physician. 2017.
5. Slipped Capital Femoral Epiphysis: Diagnosis and Management. — Peck DM, Voss LM, Voss TT. American Family Physician. 2017.
6. The Adolescent Athlete and the Team Physician: A Consensus Statement. 2025 Update. — Putukian M, Leclere LE, Herring SA, et al. Medicine and Science in Sports and Exercise. 2026.
7. The Adolescent Athlete and the Team Physician: A Consensus Statement. 2025 Update. — Putukian M, Leclere LE, Herring SA, et al. Medicine and Science in Sports and Exercise. 2026.
8. Clinical Practice Guideline for the Evaluation and Treatment of Children and Adolescents With Obesity. — Hampl SE, Hassink SG, Skinner AC, et al. Pediatrics. 2023.
9. Clinical Practice Guideline for the Evaluation and Treatment of Children and Adolescents With Obesity. — Hampl SE, Hassink SG, Skinner AC, et al. Pediatrics. 2023.
10. Acute Slipped Capital Femoral Epiphysis: The Importance of Physeal Stability. — Loder RT, Richards BS, Shapiro PS, Reznick LR, Aronson DD. The Journal of Bone and Joint Surgery. American Volume. 1993.
11. Acute Slipped Capital Femoral Epiphysis: The Importance of Physeal Stability. — Loder RT, Richards BS, Shapiro PS, Reznick LR, Aronson DD. The Journal of Bone and Joint Surgery. American Volume. 1993.
12. Quantifying Risk Factors for Slipped Capital Femoral Epiphysis and Postslip Osteonecrosis. — Zusman NL, Goldstein RY, Yoo JU. Journal of Pediatric Orthopedics. 2024.
13. Quantifying Risk Factors for Slipped Capital Femoral Epiphysis and Postslip Osteonecrosis. — Zusman NL, Goldstein RY, Yoo JU. Journal of Pediatric Orthopedics. 2024.
14. Rate and Risk Factors for Contralateral Slippage in Adolescents Treated for Slipped Capital Femoral Epiphysis: A Comprehensive Analysis of 3,528 Cases. — Momtaz D, Mirghaderi P, Gonuguntla R, et al. The Journal of Bone and Joint Surgery. American Volume. 2024.
15. Rate and Risk Factors for Contralateral Slippage in Adolescents Treated for Slipped Capital Femoral Epiphysis: A Comprehensive Analysis of 3,528 Cases. — Momtaz D, Mirghaderi P, Gonuguntla R, et al. The Journal of Bone and Joint Surgery. American Volume. 2024.
16. The Epidemiology of Slipped Capital Femoral Epiphysis in Children and Adolescents: A Systematic Review of Risk Factors and Incidence Across Populations. — Bouchard MD, Vescio BG, Munir M, et al. JBJS Reviews. 2025.
17. The Epidemiology of Slipped Capital Femoral Epiphysis in Children and Adolescents: A Systematic Review of Risk Factors and Incidence Across Populations. — Bouchard MD, Vescio BG, Munir M, et al. JBJS Reviews. 2025.
18. What Is the Best Evidence for the Treatment of Slipped Capital Femoral Epiphysis?. — Loder RT, Dietz FR. Journal of Pediatric Orthopedics. 2012.
19. What Is the Best Evidence for the Treatment of Slipped Capital Femoral Epiphysis?. — Loder RT, Dietz FR. Journal of Pediatric Orthopedics. 2012.
20. In Situ Screw Fixation for Stable Slipped Capital Femoral Epiphysis Is Safely Treated in Both Inpatient and Outpatient Settings. — Nowicki P, Carveth S, Miller K, et al. The Journal of the American Academy of Orthopaedic Surgeons. 2025.
21. In Situ Screw Fixation for Stable Slipped Capital Femoral Epiphysis Is Safely Treated in Both Inpatient and Outpatient Settings. — Nowicki P, Carveth S, Miller K, et al. The Journal of the American Academy of Orthopaedic Surgeons. 2025.
22. Outpatient Management of Slipped Capital Femoral Epiphysis Is Common, Safe, and Saves Costs: A Single-Institution Analysis and Results From a National Database Survey. — Brown EA, Wilson DR, Lawrence HW, et al. The Journal of the American Academy of Orthopaedic Surgeons. 2026.
23. Outpatient Management of Slipped Capital Femoral Epiphysis Is Common, Safe, and Saves Costs: A Single-Institution Analysis and Results From a National Database Survey. — Brown EA, Wilson DR, Lawrence HW, et al. The Journal of the American Academy of Orthopaedic Surgeons. 2026.