Anterior ankle impingement syndrome

Anterior ankle impingement (AAI) syndrome is the result of chronic repetitive trauma with impingement of the anterior tibia against the talus.

Clinical features of anterior ankle impingement syndrome include painful and limited dorsiflexion and anterior joint line swelling 1. Anterior impingement can occur after severe previous ankle sprain or repeated weight bearing activities resulting in thickening of the injured ligaments and impingement of them between anterior inferior tibia and talus.

Plain radiograph/CT

Chronic repetitive trauma from impingement of anterior tibia and talus leads to osteophytic spur formation at the anterior tibial margin and the corresponding talus, tibiotalar spur. This is best appreciated on lateral ankle radiograph or sagittal view on CT. Some advocate to the use of oblique radiographs to assess if bony spurring is medial or lateral 5.

MRI

T2FS or STIR sagittal images can be useful to demonstrate marrow oedema, subchondral changes and synovial/soft tissue thickening.

  • ankle joint osteoarthritis: loss of joint space as well as osteophytes
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Article Information

rID: 18513
Section: Syndromes
Tag: cases
Synonyms or Alternate Spellings:
  • Anterior ankle impingement (AAI) syndrome

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