Stage | Name | Clinical features | Radiography |
Early | |||
0 | Preclinical | ||
I | Preradiographic | + | |
II | + | Osteoporosis, sclerosis, cysts | |
Transition | Flattening and crescent sign | ||
Late | |||
III | Collapse | ++ | Irregular contour of head, sequestrum, normal joint space |
IV | Osteoarthritis | +++ | Flattened femoral head, narrowed joint space; collapse of head (see image) |
Stage II
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_-OErw2zV6zeWk7xI0cbB8XE5GBNFTtTRbHQNNmGNBRXNkKcvCIWnmjLSyWlWfRKUigbwxnVNMQ2LeJNCVgbSebZuvZb1TfVEbnNSfHPOLLtojHK_l6m-7ey3H0gA6IWFENvjNoZ1OM8/s1600/FicatII.jpg)
Note lucency with well-defined peripheral sclerosis. The frog-leg view is used for assessment of sphericity of the femoral heads. Drawing a circle around the femoral heads on this view will allow for detection of subtle cortical step-offs and early subchondral collapse.
Stage IV
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJIXLFtT2YjajLqL6arPlstbEs7pSRctZIJAI3NWAM1o9q_CheB9jck4B0LaGPyBopOkt8_d7kTKMxb0mJ293y5b3mcNluMAFkTodUPZnri0UVLZTfLONZb6CHI3ijzemr09UW4id6Ud4i/s400/HipAVN.jpg)
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.