This article is about a condition that evolves as an extra bone in the foot. Up to 2.5% of individuals are born with an extra bone right over the navicular bone in the foot in the middle of the arch.

Accessory navicular bone disorders represent a significant yet frequently under‐diagnosed anomaly in the paediatric foot. The accessory navicular is an extra ossicle located adjacent to the navicular ...

The accessory navicular is an extra bone growth usually found on the inside part of the foot, near the navicular bone. It’s not part of a typical bone structure in humans, and therefore, not many ...