Sesamoid bones

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Usually located in the joints of the foot and hand or in the tendons, sesamoid bones are made from the calcification of ligaments, which makes them very different from other bones of the human skeleton. Some of them are also not connected to the skeletal system. Among the best known sesamoid bones are the patella, which is a permanent bone of the human skeleton. Avulsion fracture is the main pathology affecting the sesamoid bones.