Presentation
Trauma history.
Patient Data
Age: 20 years
Gender: Female
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Os trigonum is present. Signs of posterior joint effusion are also noted.
From the case:
Os trigonum
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Os trigonum is delineated.
Case Discussion
Os trigonum is one of the bony ossicles of the foot and can be mistaken for a fracture. It sits posterior to the talus on the lateral foot radiograph and represents failure of fusion of the lateral tubercle of the posterior talar process.
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