Lateral (radial) collateral ligament complex of the elbow

Dr Henry Knipe et al.

The lateral (radial) collateral ligament (LCL/RCL) complex is a major lateral stabiliser of the elbow joint and resists varus stress.

The LCL is a Y-shaped ligamentous complex composed of three parts 1, 2:

  • annular ligament
    • from sigmoid notch to supinator crest of the ulna bone
    • forms a sling around the radial head
  • radial collateral ligament
  • lateral ulnar collateral ligament
    • lateral epicondyle to supinator crest of the ulna
  • accessory lateral collateral ligament 1
    • may be present in up to 33% of patients
    • runs from annular ligament to supinator crest
    • acts to reinforce the annular ligament
  • absence of lateral ulnar collateral ligament 1
Upper limb anatomy
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Article information

rID: 29745
Section: Anatomy
Tag: elbow
Synonyms or Alternate Spellings:
  • Lateral collateral ligament complex
  • Radial collateral ligament complex
  • Lateral (radial) collateral ligament complex

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