Table 2 Radiological clues to differentiate a fractured hallucal sesamoid and bipartite hallucal sesamoid
From: Sesamoids and accessory ossicles of the foot: anatomical variability and related pathology
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 |