Abstract
Posterior impingement syndromes of the ankle have been well described in the literature. It is most commonly associated with a prominent or fractured posterior talar process, an os trigonum or fibrotic scar tissue [Foot Ankle Int 15 (1994) 2; J Bone Joint Surg Am 78 (1996) 1491; Foot Ankle 11 (1991) 404]. There have been few reports of isolated posteromedial impingement lesions and those reported discuss findings of mechanical impingement resulting from disorganised scar tissue or ligament damage [Arthroscopy 9 (1993) 709; Am J Sports Med 29 (2001) 550]. We present two cases of posteromedial impingement of the ankle resulting from an isolated accessory bony lesion, causing symptoms distinct from fibrotic scar tissue impingement or the os trigonum syndrome.
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