Outside view of left foot. Left thumb is on the calcaneus (heel) the largest bone in the foot. right thumb is on the cuboid. I am distractiin the joint and you can see the very curved joint surface. the "take home message" is that the calcaneus is much larger and has a powerful influence on the cuboid. It is very important to evaluate mobility of the calcaneus and restore normal mobility when able, as opposed to just restoring mobility of the cuboid, in presentations of cuboid syndrome. The goal here is prevention of recurrence, not just relief of acute symptoms.