The ankle bone (talus) and the ends of the two lower leg bones (tibia and fibula) form the ankle joint, which is stabilized and supported by three groups of ligaments. Muscles and tendons move the foot and ankle.
Osteochondromas are benign bone tumors
under the toenail. They form in the bone beneath the toenail. An osteochrondroma accounts for about half of all benign bone tumors
, occurring mostly in children and young adults. Unless they cause irritation to the surrounding tissue, they are generally not very painful.
Sometimes, they can deform the toenail and cause an ingrown toenail. In some cases, they are removed surgically, but can recur even after the procedure.