• Osteochondrosis of navicular bone

• 2-8 yo - boys 3-5 times more likely

• aetilogy unknown

• usually no trauma

Presentation/Examination

• midfoot pain

• Limp

• point tenderness over navicular

• mild swelling/warmth over dorsal midfoot

• XR: navicular sclerosis, flattening, fragmentation

Treatment

• self limited

• symptoms eventually resolve

• short leg cast up to 8 weeks accelerates resolution of symptoms - long-term outcomes favorable regardless of treatment