Tendon injury

Background

Tendons of the upper extremity anatomy

• Fingers
  • FDP (DIP flexion)
  • FDS (PIP flexion)
  • Extensor dig communis (extension)
    • Mallet = DIP
    • Boutonniere = PIP
• Thumb
  • Flx pollicis longus (flexion)
  • Ex poll longus (DIP ext)
  • Ex poll brevis (MCP ext)
  • Abductor poll longus (abduction)
• Wrist
  • Flexor carpi ulnaris (flx + ulnar deviation)
  • Flexor carpi radialis (flx + radial dev)
  • Extensor carpi ulnaris (ext + ulnar dev)
  • Extensor carpi radialis (ext + radial dev)

Tendons of the lower extremity

• Extensor hallicis longus
  • Great to ext + ankle inversion
• Tibialis anterior
  • Ankle dorsiflex + inversion
  • Achilles tendon
    • Ankle plantarflex + inversion

Differential Diagnosis

Extremity trauma

• Compartment syndrome
• Contusion
• Crush syndrome
• Degloving injury
  • Morel-Lavallée lesion
  • Ring avulsion injury
• Fracture
  • Open fracture
• Laceration
• Myositis ossificans
• Open joint injury
• Peripheral nerve injury
• Rhabdomyolysis
• Tendon injury
• Vascular injury

See Also

• Hand and finger tendon injuries