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Lateral ankle radiograph shows osteophytic spur formation at
the anterior tibial margin with a subtle corresponding talar spur. There is
also subcondral cyst formation in the anterior tibia and adjacent soft tissue
swelling. The osteophytic spurs are commonly refers to as "tibotalar
spur". Anterior ankle impingement syndrome is the result of chronic repetitive
trauma with impingement of the anterior tibia against the talus. The associated
changes described is best appreciated on the lateral view. Clinical features of
anterior ankle impingement syndrome include painful and limited dorsiflexion
and anterior joint line swelling.
1. Robinson P. Impingement syndromes of the ankle. Eur Radiol. 2007;17(12):3056-65.