Femoral Epiphyseal Fragmentation

Modern Study Review (AI-Generated)

High-Yield Summary

Femoral epiphyseal fragmentation in children is a radiographic finding often associated with several pediatric hip disorders, most notably Legg-Calvé-Perthes disease (LCPD) and slipped capital femoral epiphysis (SCFE). A painless limp is a common presenting symptom, requiring a thorough differential diagnosis to exclude congenital, developmental, inflammatory, neoplastic, vascular, infectious, and dysplastic causes. Early and accurate diagnosis is critical to guide appropriate management and optimize long-term hip function and pain control.

Key Diagnostic Findings

Anatomy

• Femoral epiphysis: The growth plate region at the proximal femur responsible for longitudinal growth.
• Blood supply: Vulnerable to disruption in conditions like Perthes disease, leading to avascular necrosis and fragmentation.

Clinical Presentation

• Painless limp: Classic for Perthes disease; SCFE may present with pain but can also be painless initially.
• Gait abnormalities: Trendelenburg gait or lurch due to abductor weakness.
• Range of motion:
• Perthes: Decreased internal rotation and abduction.
• Developmental dysplasia of the hip (DDH): Limited abduction.
• SCFE: Obligate external rotation with hip flexion.
• Systemic signs: Usually absent; important to rule out systemic or infectious causes.

Imaging

• X-rays:
• Look for unilateral or bilateral sclerosis and fragmentation of the femoral epiphysis.
• Evaluate both hips to avoid missing bilateral involvement or alternative diagnoses.
• Early Perthes: Epiphyseal fragmentation, sclerosis, and flattening.
• SCFE: Posterior and inferior displacement of the femoral head relative to the neck.
• Advanced imaging: MRI can detect early ischemic changes before radiographic signs appear.

Classification Systems

Current Gold Standard Treatment

Non-operative

• Indications: Early-stage Perthes with minimal epiphyseal involvement (Herring A or B), stable SCFE with minimal slip, and patients with good hip range of motion.
• Treatment: Activity modification, physical therapy focusing on maintaining hip motion, NSAIDs for pain, and protected weight-bearing or bracing in select cases.

Operative

• Indications:
• Perthes: Severe fragmentation (Herring B/C), loss of containment, or progressive deformity.
• SCFE: Unstable slips or slips >30° Southwick angle.
• Procedures:
• Perthes: Femoral or pelvic osteotomies to improve femoral head containment and joint congruity.
• SCFE: In situ fixation with a single cannulated screw; osteotomy reserved for severe deformities or chronic slips.

Modern Complications & Outcomes

Complications

Outcomes

• Perthes: Prognosis depends on age at onset and lateral pillar classification; younger children (<6 years) generally have better outcomes.
• SCFE: Early diagnosis and stable fixation yield excellent functional results; unstable slips have higher morbidity.

Classic Clinical Notes

Femoral Epiphyseal Fragmentation

Approach to Child with Femoral Epiphyseal Fragmentation

This is from Yaser’s case that Chris presented him.

• Child with painless limp, right side.
• Go through the differential diagnosis of painless limp: congenital, developmental, inflammatory, neoplastic, vascular, bony dysplasia, infectious: most of these have pain. Perthes is the classic painless limp. Also SCFE.

• Go through the history, looking for systemic signs, trauma, previous infections, other joints involved, other dysmorphic features, height/weight (bony dysplasias).

• On physical, look for gait abnormalities (lurch), abductor weakness, leg length, signs of spinal dysraphism, endocrine abnormalities, wasting, neurology, limitations of motion. Perthes often have decreased internal rotation and abduction. DDH has limited abduction. SCFE have obligatory external rotation with flexion.

• Now, for the x-rays: unilateral or bilateral sclerosis and fragmentation of the femoral epiphysis
• First thing, make sure you look at both hips!
• Don’t jump to the conclusion that the kid has Perthes.
• The other possibilities include:
• Meyer’s dysplasia (if really young)

Last Updated on January 25, 2026 by orthonet