The sinus tarsi (talocalcaneal sulcus) may be associated with a syndrome presenting as lateral ankle pain.

Anatomic boundaries of the sinus tarsi:

(1) calcaneus

(2) talus

(3) talocalcaneonavicular joint

(4) posterior facet of the subtalar joint


Clinical findings:

(1) pain in the anterolateral ankle or lateral aspect of the calcaneus

(2) worsening of pain after exercise or while walking on an uneven surface

(3) feeling of instability with pronation and supination of the subtalar joint


Risk factors:

(1) repeated lateral ankle sprains

(2) repeated hyperponation of the foot


MRI will detect most issues and is noninvasive.

Arthroscopy may detect more problems and allows for some interventions.

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