A thickening on the surface of the calcaneus bone is usually a heel spur.
heel spur
overuse injury
A heel spur
periostem
The calcaneus is the name for the bone that makes the heel. It forms a large bulbous projection from the posterior and inferior part of the foot to which the calcaneal tendon (or Achilles tendon) attaches.
The calcaneus.
calcaneus
The largest tarsal bone in the human body is the calcaneus, or heel bone.
The talus bone sits on the calcaneus.
The calcaneus (heel bone)
The Calcaneus
Ear bone
calcaneus