These fractures involve the cuboideonavicular joint and the mid-tarsal joint, also known as the transverse tarsal joint or Chopart's joint, which consists of two joints:

• articulation between calcaneus and cuboid (calcaneocuboid joint) 
• articulation between talus, navicular and calcaneus (talocalcaneonavicular joint), which is a ball (talus) and socket (concavity of posterior surface of navicular and anterior articular surface of calcaneus) joint

This case demonstrates the possible underestimation on conventional X-ray imaging of fracture extent and the importance of clinical findings when considering additional imaging investigations.