Costoclavicular ligament

Dr Craig Hacking and Dr Aaron Wong et al.

The costoclavicular ligament or rhomboid ligament is the major stabilising factor of the sternoclavicular joint.

Gross anatomy

The costoclavicular ligament binds the inferior medial clavicle (via the rhomboid fossa) to the first costal cartilage and adjacent end of the first rib. It is composed of an anterior lamina and posterior lamina which are usually separated by a bursa.

  • anterior lamina
    • origin: anterior lip of the ligamentous impression (rhomboid fossa) on the clavicle
    • insertion: runs downward and medially to the first costal cartilage
  • posterior lamina
    • origin: posterior lip of the ligamentous impression (rhomboid fossa) on the clavicle
    • insertion: runs downward and laterally to the adjacent end of the first rib

The rhomboid fossa may be prominent and simulate a lytic lesion (see case 1).

Upper limb anatomy
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Article information

rID: 33417
Section: Anatomy
Synonyms or Alternate Spellings:
  • Costoclavicular ligaments
  • rhomboid ligament
  • rhomboid ligaments

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Cases and figures

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    Case 1: left rhomboid fossa of the clavicle
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