- 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
![Kohler's disease
Self-limiting and heals spontaneously with reossification and reconstitution within a few years](https://q-radiology.com/wp-content/uploads/2022/12/image-207-1005x1024.png)
Self-limiting and heals spontaneously with reossification and reconstitution within a few years
![4 year-old boy presented with right foot pain
flattening and sclerotic change of right navicular bone suggesting Kohler's disease](https://q-radiology.com/wp-content/uploads/2022/12/image-208-1024x1000.png)
flattening and sclerotic change of right navicular bone suggesting Kohler’s disease
![4 year-old boy presented with right foot pain
flattening and sclerotic change of right navicular bone suggesting Kohler's disease](https://q-radiology.com/wp-content/uploads/2022/12/image-209-1024x955.png)
flattening and sclerotic change of right navicular bone suggesting Kohler’s disease