Obturator nerve entrapment

Background

• Follows trauma and pelvic fractures

Clinical Features

• Pain in groin and down inner thigh
• Aggravated by movement of the hip

Differential Diagnosis

Hip pain

• Femur fracture
• Hip dislocation
• Hip bursitis
• Psoas abscess
• Piriformis syndrome
• Meralgia paresthetica
• Septic Arthritis (Hip)
• Obturator nerve entrapment
• Pelvic fractures
  • Acetabular pelvic fractures
  • Open book pelvic fracture
  • Straddle pelvic fracture
  • Pelvic avulsion fracture
• Avascular necrosis of hip

Management

• Refer for for definitive diagnosis with electromyography

Authors:

Ross Donaldson