Bipartite sesamoid bone
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Smooth transverse lucency and well-corticated margins involving medial hallux sesamoid is seen likely presenting bipartite sesamoid bone.
No evidence of bone injury or soft tissue swelling.
This is a 40-year-old lady presented to the emergency room after falling down, with forefoot pain. Upon obtaining an x-ray, a fracture of sesamoid bone was suspected. The medial hallux sesamoid is larger than the lateral one, and in two pieces which is typical of bipartite morphology. Additionally, lucency appears smooth with well-corticated margins more in keeping with synchondrosis than a fracture.