Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Modified Steinberg Staging Systems for Osteonecrosis
| Stage | Radiographic Appearance | Reversible |
|---|---|---|
| I | Normal radiographs, but abnormal bone scan or magnetic resonance image | Yes |
| II | Lucent and sclerotic changes | Yes |
| III | Subchondral fracture without flattening | No |
| IV | Subchondral fracture with flattening or segmental depression of femoral head | No |
| V | Joint space narrowing or acetabular changes | No |
| VI | Advanced degenerative changes | No |
