Ankle and Foot Conditions

Avascular necrosis of the navicular is not very common. Etiologies can be: - Post-traumatic - Biomechanical - Charcot arthropathy Regardless, the appearance is always terrible looking. The navicular will be sclerotic and narrowed. As with post-traumatic and charcot, the navicular can be severely fragmented.
Navicular is narrowed under the pressure of the talar head	Navicular is often displaced medially and dorsally
The other foot of the last case
Post-traumatic case	Medial and lateral columns were both shortened due to trauma