Presentation
Atraumatic pain at the dorsal midfoot with focal tenderness
Patient Data
Age: 12 years
Gender: Female
From the case:
Os supranaviculare - symptomatic
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Small, edematous ossicle at the dorsal aspect of the proximal navicular bone, coinciding with the level of the marker capsule.
Case Discussion
This is an unfused accessory ossification center at an abnormal location on the dorsal aspect of the proximal navicular bone, equivalent to an os supranaviculare in an adult. It is unfused and edematous and most likely the cause of this patient's symptoms..
An os supranaviculare is present in about 1% of adult individuals. It should not be mistaken for an intraarticular fracture at the dorsal proximal aspect of the navicular. Some researchers have found an association with navicular stress fractures in adults.
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