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Posterior Ankle Joint Recess

recessus posterior articulationis talocruralis

The posterior ankle joint recess is the posterior extension of the tibiotalar synovial space between the posterior tibial plafond and the posterior talar dome, lying anterior to the posterior capsule and the posterior inferior tibiofibular ligament. In forced plantarflexion, this recess is compressed by the posterior tibial lip and the posterosuperior calcaneus, contributing to posterior ankle impingement. The flexor hallucis longus tendon traverses the medial aspect of this recess in its posterior groove.

Region: Foot & Ankle

Clinical Relevance

Clinical Notes

The posterior ankle recess is accessed in posterior ankle arthroscopy through posterolateral and posteromedial portals, allowing debridement of posterior capsular synovitis, os trigonum excision, posterior talar osteophyte removal, and FHL tenolysis in its groove. Posterior ankle impingement from this compressed recess is managed by arthroscopic or open posterior debridement. The posterior capsule and recess become thickened in chronic impingement. Fluid in the posterior recess on ultrasound or MRI indicates posterior ankle joint pathology.

Pathology

Common Injuries & Conditions

Posterior Ankle Impingement Syndrome

Forced plantarflexion in ballet dancers and footballers pinches the posterior ankle recess capsular tissue and synovium between the posterior tibial lip, the posterior talar dome, and the os trigonum, producing deep posterior ankle pain at maximal plantarflexion managed by posterior ankle arthroscopy with os trigonum excision and posterior synovectomy.