Accessory navicular syndrome

Case contributed by Dr Ammar Haouimi

Presentation

Painful medial foot.

Patient Data

Age: 30 years
Gender: Male
MRI

There is an accessory bone of triangular shape measuring about 10 mm, adjacent to the posteromedial tuberosity of the navicular bone with a cartilaginous connection between them as well as bone marrow edema involving both the accessory ossicle and navicular bone.

Mild talocrural joint effusion is noted.

 

Case Discussion

MRI features of an accessory navicular syndrome.

The accessory navicular syndrome occurs when a type II accessory navicular becomes painful due to movement across the pseudo-joint between the ossicle and the navicular bone. The MRI shows bone marrow edema involving both the accessory ossicle and navicular bone.

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