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Revision 3 for 'Accessory navicular syndrome'

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Accessory navicular syndrome

Accessory navicular syndrome occurs when a type II accessory navicular (or "os tibiale externum") becomes painful due to movement across the pseudojoint between the ossicle and the navicular bone.

The syndrome presents on MRI with bone arrow edema on fluid-sensitive sequences in both the accessory ossicle and in the navicular. It can be inferred on musculoskeletal ultrasound if a patient's pain is located at a type II accessory navicular and the patient is tender to transducer pressure.

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