Fig. 2From: A new classification of talocalcaneal coalitions based on computed tomography for operative planning22-year-old male with an I-MP type coalition involving both middle and posterior facets. (A) The tarsal sinus (black arrow) can be seen. A significantly overgrown talus (white arrow) covers the calcaneus. The marginal cortical irregularity of the calcaneus is also noted. (B) The tarsal sinus cannot be seen and only the posterior facet is shown (white arrow). The two images (A, B) indicate that the coalition involved both the middle and posterior facets. A significantly overgrown talus (white arrow) covers the calcaneus. The marginal cortical irregularity of the calcaneus is also noted. (C) 3D reconstruction image shows that the overgrown talus covers the calcaneus like a shingle (oval) without the open of sinus tarsalBack to article page