(also sesamoid bone)
A small independent bone or bony nodule developed in a tendon where it passes over an angular structure, typically in the hands and feet. The kneecap is a particularly large sesamoid bone.
- Plain radiographs may reveal the type of injury by the position of the sesamoids.
- A sesamoid bone may develop in the bicipital tendon over the radial tuberosity.
- The patella is the largest sesamoid bone in the body and provides increased mechanical advantage for knee extension.
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