A sesamoid is a type of bone that is found within a tendon. These small bones allow smooth movement of the feet. Sesamoid fractures most commonly refer to the bones located under the big toe. These are the least common fractures of the forefoot.

Sesamoid Bones of the Foot
sesamoid bone foot
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Sesamoid fractures can be caused by:

  • Injuries, particularly:
    • Falling from a height and landing heavily on the feet
    • Crush injury
  • Repetitive stress to the bone
  • Hyperextension of the toe and forefoot