Fig. 8
From: A new classification of talocalcaneal coalitions based on computed tomography for operative planning
23-year-old man with an IV-MP type coalition involving both the middle and posterior facets. (A, B) The tarsal sinus (black arrow) can be seen and both the talus and calcaneus (white arrows) overgrow and cover each other (A). A complete osseous coalition (white arrow) can be seen in the posterior facet (B). (C) 3D construction image shows that the talus and calcaneus fuse together (oval) without the open of tarsal sinus