A young girl suffering from ankle pain occurring after gymnastics classes was referred to the rheumatology department by an
orthopedic surgeon because a rheumatological condition was suspected to cause her symptoms. MRI was useful in pointing to
the correct diagnosis of accessory navicular bone (AN). The morphological classification of ANs is discussed and the imaging
modalities for diagnosis are presented.
Keywords Accessory bones - Ankle - Magnetic resonance imaging - Midfoot - Radiography