Trochanteric femur fracture

Background

• Greater trochanter
  • Caused by direct trauma (older patients) or avulsion injury (adolescents)
• Lesser trochanter
  • Avulsion due to forceful contraction of iliopsoas (adolescents) or pathologic bone

Femur Fracture Types

Proximal

• Intracapsular
  • Femoral head fracture
  • Femoral neck fracture
• Extracapsular
  • Intertrochanteric femur fracture
  • Trochanteric femur fracture

Shaft

• Mid-shaft femur fracture (all subtrochanteric)

Clinical Features

• Greater Trochanter
  • Hip pain that increases with abduction; tenderness over greater trochanter
• Lesser Trochanter
  • Patients usually ambulatory
  • Pain in groin worse with flexion, or patient has difficulty lifting leg at hip from seated position (iliopsoas insufficiency)

Differential Diagnosis

Hip pain

Acute Trauma

• Femur fracture
  • Proximal
    • Intracapsular
      • Femoral head fracture
      • Femoral neck fracture
    • Extracapsular
      • Intertrochanteric femur fracture
      • Trochanteric femur fracture
  • Shaft
    • Mid-shaft femur fracture (all subtrochanteric)
• Hip dislocation
• Pelvic fractures
  • Acetabular pelvic fractures
  • Open book pelvic fracture
  • Straddle pelvic fracture
  • Pelvic avulsion fracture

Chronic/Atraumatic

• Hip bursitis
• Psoas abscess
• Piriformis syndrome
• Meralgia paresthetica
• Septic arthritis
  • Septic arthritis of the hip (peds)
• Obturator nerve entrapment
• Avascular necrosis of hip

Evaluation

Hip fracture classification.

Location of femur fractures

• Consider AP pelvis in addition to AP/lateral views to compare contralateral side
• Consider MRI if strong clinical suspicion but negative x-ray

Management

General Fracture Management

• Acute pain management
• Open fractures require immediate IV antibiotics and urgent surgical washout
• Neurovascular compromise from fracture requires emergent reduction and/or orthopedic intervention
• Consider risk for compartment syndrome

Disposition

• Outpatient
  • Non-weight bearing with ortho follow up in 1-2 weeks (for both types)

See Also

• Femur fracture