- Osteonecrosis of navicular bone
- 3 ~ 7 yr, Earlier onset of the disease : less or no sequelae
- boy > girl
- Mild pain, tenderness, swelling, limitation of motion
- Bilaterality
- Bilaterality
- Flattening, sclerosis, wafer-like shape, fragmentation of navicular bone, soft tissue edema, preserved joint space and articular cartilages
- Sequelae (-) : regeneration, normalization
- Sequelae (-) : regeneration, normalization
- MR & US : Preserved articular cartilage
- DDX : normal variant
Self-limiting and heals spontaneously with reossification and reconstitution within a few years
flattening and sclerotic change of right navicular bone suggesting Kohler’s disease
flattening and sclerotic change of right navicular bone suggesting Kohler’s disease