Cuboid

Function

The cube of the outer midfoot — its grooved underside chutes the peroneus longus tendon toward the big toe, and with the calcaneus it forms the lateral column the foot rolls over.

Landmarks

• Peroneal sulcus (groove)
• Calcaneocuboid joint
• Tuberosity

Articulations (joints)

• Calcaneus
• Lateral cuneiform
• Fourth and fifth metatarsals

Clinical relevance

Cuboid syndrome — a subtle subluxation — follows ankle inversions, causing lateral midfoot pain in dancers; the 'nutcracker' fracture crushes it between the calcaneus and the fourth/fifth metatarsal bases.