Table 2.

Radiological clues to differentiate a fractured hallucal sesamoid and bipartite hallucal sesamoid

Single medial sesamoid with a fracture	Bipartite medial sesamoid
Slightly larger than the lateral sesamoid, whereas the	Much larger than the lateral sesamoid
Show a sharp, radiolucent, uncorticated line between the two fragments	Two corticated components
The two fragments often fit together like pieces of a puzzle	The two components do not fit like pieces of a puzzle
A 99mTc-MDP bone scan will show increased uptake	A 99mTc-MDP bone scan should be normal
MRI may show bone marrow oedema in a recently fractured sesamoid	No MRI signal abnormality