Sesamoid

Another surgery revealed she had shattered the other sesamoid bone in the same foot, and it was removed in a rare — and perhaps ill-conceived, her family now believes — procedure.

Both heads are inserted on the lateral sesamoid bone of the first digit.

Platzer (2004), p 270 render The abductor hallucis stretches along the medial edge of the foot, from the calcaneus to the base of the first phalanx of the first digit and the medial sesamoid bone.

Sesamoid bones are small ossified nodes embedded in the tendons to provide extra leverage and reduce pressure on the underlying tissue.

The patella or kneecap on each side is an example of a larger sesamoid bone.

There is also a variable number of small sesamoid bones, commonly found in tendons.