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Medial approach to the calcaneus

Superficial dissection
Once beneath skin, identify the posterior tibial tendon, the neurovascular bundle and the flexor hallucis tendon. The interval to develop is between the neurovascular bundle, specifically the posterior tibial nerve and the flexor hallucis tendon, which is retracted distally. You must incise the retinaculum and feel for the bump which is the sustentaculum. It is immediately above the flexor hallucis tendon.