Presentation
Medial foot pain.
Patient Data
Age: 35 years
Gender: Male
From the case:
Accessory navicular syndrome
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There is an accessory bone located on the posteromedial tuberosity of the navicular bone. The accessory bone has a cartilaginous connection to the navicular consistent with a type 2 accessory navicular with minor bone oedema at the synchondrosis.
The tibialis posterior tendon appears normal.
Case Discussion
Accessory navicular bone is also known as os tibiale externum or os naviculare and is considered a normal anatomical variant; although it can be painful (accessory navicular syndrome) and may cause a painful tendinosis of adjacent tendons.
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